Install a Ford Motorsport E303, X303 or F303 cam, or any of the similar units from Indy, Lunati or your favorite manufacturer. The '00 Ford Explorers and Mercury Moutaineers were factory equipped with one of Ford's better 5.0L motors. Yes- thank you. Choose a cylinder head before you install the pistons. I have been working on Fords for 40 years and I have experimented with a few tricks of my own. You didnt mention what camshaft you would be choosing or exactly which 5.0L Ford Windsor engine you are working with. It's an 86 roller 5.0 engine that had a recent rebuild sometime in the past with keith black pistons, otherwise stock. For a better experience, please enable JavaScript in your browser before proceeding. Keep in mind that swapping camshafts is a fairly extensive effort. You didnt provide a lot of information about the engine itself, Im assuming its 85 or newer ( roller cam) May need a freshen up of the bottom end if compression is the issue. i've got a short block started, and i recently came across a set of GT40P heads for FREE ( love family members). These heads have been remanufactured using refaced reclaimed Factory Valves. Once you get into the FoMoCo aftermarket aluminum GT40s though, all bets are off. Cant wait to try um out. Then why did you port the heads and how do you know if you made an improvement. They fill that spot between power and budget. 1983 Mustang G.T. JavaScript is disabled. These are some of the best castings Ford ever produced for this engine, and are still fairly cheap and available used. Or, you could invest in a new set of heads that would also do the same job but you can expect to spend quite a bit more money. I was looking at putting on the GT40P heads on. In mid-1997, the Explorer and Mountaineer 5.0 L heads were revised and renamed . I need that part number too! FULL DYNO RESULTS. I have heard this rod bolt weakness myth for years but have yet to have a single problem with them in any of the SBF engines I have pounded on for the last 30 years and there have been lots of them. Central Coast Mustang sells GT-40P heads at a great price, making them a viable alternative in a market flooded with performance head choices. That's fantastic for the minimal investment we made. Here is the lowdown on exhaust manifolds and VALVE SPRINGS. how hard to put on? The spark plug issue is almost a non-issue. Buy the lifters for peace of mind now and hopefully for the duration. The only failures Ive had were timing chains and a couple broken rods in a mid 80s 302 with 200,000 miles on it that got about 35 lbs of boost stuffed into it when a pop off valve I bought on ebay failed. Not *as* good as the GT40p heads, but I'd prefer to not have to worry about exhaust fitment issues, or have a narrow range of what I can work with. 97% Positive Feedback . Have fun, be safe, enjoy. But the part about a cam replacement possibly being a labor intensive undertaking is correct. I plan on running a AFM b31 cam too which has relatively small duration for the intake valve. I bought a crate 302 from Downs Ford a few years ago that was producing 320 hp. In order to make Coyote-type power you will need some expensive, high-flow cylinder heads with a short block that can withstand spinning in excess of 6,500 rpm. The heads also required some machine work, including screw-in studs, guideplates, and widening the spring pockets for bigger valvesprings. OR you could put your automotive journalistic skills in motion by reporting on the many new modern components available for the latest generation 351 Cleveland. Holten's best time is a 12.63 at 105.9 mph, and if we gain the desired result he will be right in the thick of things in Trophy Stock competition. Seriously though if you're not planning on an all-out attack for HP, I'd consider a forged piston out of Probe's SRS line-up. This will cost additional money but is still worth it, in our opinion. Holten runs the factory fan, but he had removed it when he ran the 12.63. Some ideas never go out of style. If we subtract the 20 hp that the fan is worth, we end up with a gain of 25 hp. Test 2: Changed to the smaller of the two Lunati camshaftsno other changes. When compared to the new generation of performance engines on the market today like the 5.0L DOHC Coyote engine, your engine will not come close. 402 HP NA from a HI PO 289 isnt that mysterious of a feat to accomplish with todays SBF Aftermarket parts availability. This 1979-1995 Mustang cylinder head and camshaft guide will overview the heads and cams we offer and how they will coincide. The gt40p head is considered the best OEM 302 head made. This kind of improvement may not seem like much, but the owner of our test car, Jamie Holten, runs in FFW Trophy Stock where three-tenths is a lifetime. This is needed for the steel roller cam. (A starter is a motor, windshield wipers use a motor,electric windows use motors) Any one uses that terminology in my shop will be corrected once, only once. Generally expect with a good cam, intake, roller rockers and a good ignition system to see around 300-350 max rear wheel horsepower, depending on what type of dyno you use. http://vb.foureyedpride.com/showthread.php?t=89153, http://www.facebook.com/groups/233213650060739/, ascMcLaren & Motorsport/Grand Prix IV Capris, RHD and Other International/Export Models, Mods, Maintenance & Mechanical FAQs/Archive, If this is your first visit, be sure to Let us explain. Just put some 1.7 pedistal rocker arm on along with a mild camshaft (make sure to use the correct valve springs), you will make over 300 flywheel hp. I got lucky and found a complete Explorer GT40P engine online. In a 3,250-pound car like a Mustang with 3.50 gears and an automatic with a 2,800-rpm converter, this 5.0L could pull 12.80s at 108 mph. hole size 302 is 7/16 and 351 is 1/2 could the gear of off the oil pump drive(i know they're DIS), for the explorer motor be used on his dizzy? If I remember right, non of the GT40P's (later models) had the thermactor smog provisions. That's a 40 per cent increase in power from a simple head and cam swap, and one seriously happy Mustang owner! MAC is the only manufacturer of these headers, and the parts we installed fit like a glove with no problems whatsoever. I have to agree, the GT40P heads flow better than the GT40 iron heads. I'd much rather be able to drive it at 8 or 9/10s of what it can handle. GT40, GT40P, would be great factory heads. how much HP and torque? Theres many options available for a little more power. We also added an Edelbrock Performer RPM dual-plane intake and a set of 158-inch headers with no mufflers. This one added another 10 degrees of duration over the smaller Voodoo cam, along with 0.020 inch more intake valve lift. FORD GT40p 4 BAR HEADS IN GOOD CONDITION . I ran the Speed Pro L2488 pistons and it had me around 9.9 compression with a .041 head gasket, Now I had GT40 heads milled .020 and so that's just a guess on the CC. It's a classic move we've pulled off many times. They work, but present their own challenges. Motor is going into a Ranger. SB Ford, GT40 .575" Lift Max Output II Drop in Valve Spring Kit, Hyd Roller, 140 Lb Seat. As noted, this is looking like hes building a 351 Lightning truck motor, which is a good way to go. If you have a early 351W ie pre 76 it probably . JEGS High Performance. You'll also have to use your 289 timing chain cover since it has a hole for the oil dip stick and fuel pump. For this reason, we're not sure what kind of boost the GT-40P heads will give. We know what you're thinking--only two-tenths from an extra 45 hp? We started with a 120,000-mile 5.0L out of a Ford Explorer, removed the EFI and DIS, and pocket ported the stock GT40P iron heads with stock valve sizes. Im running stock GT40 heads with stock 4.000 bore on cylinders and a Lunati cam with 256/262; Duration @ .050 (Int/Exh): 213/219; Gross Valve Lift (Int/Exh): .483/.499; LSA/ICL: 112/108. With no other changes we gained 25 hp using factory iron heads. The GT40P heads flow a lot better than stock 351 heads. The only way to really make more power is to go with a stroker kit, blower and/or heads. Richard Rowe has been writing professionally since 2007, specializing in automotive topics. I have a 66 mustang with its original untouched 289 with over 140 k on it that Ive been running a blow thru turbo making 14 lbs of boost on for the last 5 years and its never given me a problem. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. The rest went very smoothly, and we reused the stock lifters and suffered no ulcers worrying about breaking in the cam. (Please note these are not GT40P Explorer heads). Finally, we exchanged the Explorer's EFI manifold (which is a pretty good manifold in its own right) for an Edelbrock Performer RPM Air Gap intake and a Holley 750-cfm HP-style carburetor. Jeff Smith has had a passion for cars since he began working at his grandfather's gas station at the age 10. I'm sure the dyno operator used some goofball correction factor to make the numbers look higher. The reason this new generation of Ford engines make a ton more power is they also enjoy fantastic cylinder heads and four valves per cylinder. This engine will be good for your 65 Mustang. SBF FORD Aluminum Cylinder Heads 302 /351w 190cc 62cc 2.02 /1.60 For ROLLER CAM. The GT40P heads flow a lot better than stock 351 heads. Location: Re: Stock Ford 351W 4bbl dyno numbers. I am very happy too. 02-11-2012, 07:16 PM #6 fiveoh 86lx It turned out we were conservative on both counts. 87-93-95 Ford Mustang GT40P Engine Cylinder Heads REBUILT 302 351 GT40 SBF OEM | eBay Motors, Parts & Accessories, Car & Truck Parts & Accessories | eBay! The GT40 heads have thermactor holes built in to connect to the EGR/smog equipment whereas the GT40P heads use an external EGR connective system. As a final goal, we decided to bolt on a simple nitrous system and see if we could push this little small-block Ford to make some real power. We bolted the Ford to the dyno with a set of 158-inch long-tube headers and an 18-inch collector extension to help the low-speed torque, then we fired up the small-block. I have a 432 HP non Hi Po 289 I built. Learn how your comment data is processed. BONUS TEST-FOUR DIFFERENT 302 INTAKES.. Over $2050 for the 165/185 renegades. Common sense would suggest that with the heavy lifting complete and the old cam removed, by not installing the new roller lifters along with the camshaft could be asking for the possibility of trouble just a few thousand miles down the road. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. When I purchased my "brand new" set of GT40P's, I bought them from an Mustang specific machine shop that used to exist called Central Coast Mustang. Limited header choice is certainly a challenge. In a lightweight Fox or early Mustang with a five-speed behind it, this would be a great little street engine. For real performance, stock E7TE heads leave a lot to be desired. Go for it if you get them super cheap and can get headers/manifolds super cheap as well but otherwise I'd say it's a waste of time and money. The MPH was there to run a little better but the local track is about terrible. the engine is carburated of that makes a difference. There are a lot of variables that must be addressed to give a better estimate, but a good basic estimate is 20-40 HP at the crank. well i finally did my first ever carb build, ive always been an EFI guy Black 1985 GT: 408w, in the 6's in the 1/8 mile. You should be able to get away with a 150 to 200 horsepower shot later, but it's best to start out small and work up. If you can get the mentioned GT-40 heads with studs for a good price, that would be good for you. Paying a premium for a set of GT40P heads or dumping money into some to get their performance to rival aftermarket is not for me. How much HP and torque do you think I. Once the headers are in place, then you can consider if you still want more power. We did the installation at Holten's place of employment, Motorworks, in Longwood, Florida. Holten tells us removing the fan is worth two-tenths in itself, which tells us the fan soaks up roughly 20 hp. These are some of the pictures I have showing the Explorer manifolds. I went to a couple in Tucson and almost all the Ford vehicles that came with a 5.0 had the heads missing. This will keep you from dropping your overall static compression ratio and losing power. We also discovered some issues with the GT40P heads that required changes, so we added valves from Manley that eliminated the exhaust-valve rotators and allowed us to set the proper valvespring installed height. These cast piston short-blocks are not quite as good as the forged piston 5.0L that came in Fox-body Mustangs, but the GT40P heads flow much better than earlier 5.0L heads. Real world data seems to show that GT40 or GT40P cylinder heads, assuming no other mods on your Foxbody, are good to add anywhere between 20-40 HP (over stock heads). These are among the best of the iron Ford Windsor heads as they tend to flow much better than earlier castings. If they are cheap enough, take them anyway. Within a few hours of his discovery, the engine was sitting in the back of his truck on its way to a new home. JavaScript is disabled. Come join the discussion about popular models such as the Mustang, Galaxie, Falcon, Fairlane, Torino, Shelby and many more! The heads got a 3 angle valve job, new valves from speed-pro and all the valve train was from crane that matched the current hydraulic cam. Can anyone give me a little feedback about a '99 Explorer 5.0, and tell me if it's my answer. Take the assembly to a machine shop to have it balanced and install it in the block. The 302 uses smaller 7/16" head bolts and your "P" heads may or may not require the step washers. Or just play it safe and let the fans ask away about another daring 5.0 TB bolt on or for an exciting surprise, do a LS______ fill in the blanks. Through Central Coast you can have the heads fully prepped for your combination. Its NA but makes use of AFR heads and some other aftermarket goodies. If you smooth out the bowls and exhaust ports and gasket match the intakes they should flow decent. Per a UEM tech support email I have the Icon IC736 is supposed to be good for GT40 heads when I asked about it. SBF engines are modified constantly. It took him and yours truly eight hours from start to finish, using air tools and a lift to gain access to the header flanges. These are Ford iron GT-40P heads. All this is worth it. Build Thread 1965 Fastback Project "Racesteed". However, since Holten's car has an E303 cam, we didn't want the pistons and valves becoming too close, so we chose the 1.6 rockers. LOW-BUCK 302 FORD HEAD UPGRADE Richard Holdener 239K subscribers 189K views 2 years ago WESTECH PERFORMANCE GROUP WHAT'S IT WORTH? In an effort to preserve the history of the Early Fox Era, FEP covers the following vehicles: 79-86 Mustang and Capri, 84-86 Mustang SVO, 78-83 Fairmont & Zephyr, 83-86 LTD & Marquis, 80-88 Thunderbird & Cougar, 82-87 Continental, 84-92 Mark VII, 81-82 Granada. I may do some port matching and a little cleanup, otherwise just a set of springs and cam and see what I have. i have a question once i get the gt40p heads from the explorer truck can i also take the exhaust manifolds or headers and fit them in my 66 mustang:?:!?!?!? I'd get the gt40 setup, and put an s trim on it. Smith began writing for Car Craft magazine in 1979 and became editor in 1984. Those heads were unported and had stock valve sizes! There are a couple of reasons for this suggestion. I had a set of 69 302 heads I ran for a while . Runs well. that is a healthy budget deal. ported GT-40p, ported cobra intake, 65mm BBK, e-cam with 1.7s, longtubes, off-road x-pipe with flowmasters dumped. It runs smooth but seems lazy. The GT40 & GT40P heads had a few differences that are note-worthy, the most importantly being the bump in compression. These are some of the best castings Ford ever produced for this engine, and are still fairly cheap and available used. We were cruising the 'yard a while back and located a 2000 Ford Explorer with an EFI 5.0L V-8 engine. I recall having an absolute blast with my old K-code coupe back in the day. Save narve00 $700.98. Small-block Fords and Mopars only use four head bolts per cylinder, so retaining proper head-gasket sealespecially with nitrousis a point that demands attention, so we ordered a set of Fel-Pro MLS head gaskets rather than a standard, composition gasket. Enter your search keyword. The results were a major increase in power throughout the entire rev range, with an increase of 60hp at 4500rpm through to a peak of 279hp at 5800rpm. Small Block Ford 289/302/5.0L/351w 180cc/60cc Aluminum Cylinder Head E42004. 302 explorer short block with roughly 80k miles GT40's from a local u pull n pay ($97) weiand x-celerator trick flow stage 1 cam 650 holley double pumper car made 322/329 SAE . You didnt mention the car this engine is in, but lets assume there is enough room to remove the radiator and any other coolers and perhaps some or all of the front grille and/or brackets before the cam has sufficient room to exit the front of the engine. These are a great head but do need some machining mods to make they really work well. That carbureted GT40P motor made 465 on th engine dyno with a .500" 239/244 camshaft, Holley 650 carb and Weiand Stealth intake. Add a distributor designed for a carbureted 302 but make sure to install the correct distributor gear for your cam. If the head bolt holes are 1/2" or slightly larger, ARP makes the washers and can be sourced from Ford Racing or ARP through a speed shop or Summit, Jegs and PAW among others. If this is beyond your technical ability, you could ask a local machine shop to perform the modifications. This is just a quick overview of the changes that need to be done. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. As usual, there is much more to this story. Never not once have I ever seen a SBF rod bolt create a failure. This is a common mistake with first-time cam buyers who dont necessarily appreciate that the cam is just one component of the overall engine package. Actually the regular gt40's in either aluminum or iron are the good ones but the gt40p's are only a slight improvement over regular 302 heads. You could run a thinner head gasket as well. Im now thinking of adding a cam to match the carb. Just got through porting one of my gt40p heads today. Click to reveal . I'm running BBK un-equal length shorty's, and I'm able to get all the plugs in, tight, and all plug wires on. Using the manufacturer recommended springs for your camshaft are a safe bet. Do not ever, ever think about using the tube type manifolds. We gained 45 hp and 40 lb-ft of torque. While the heads were off getting a massage, we turned our attention to the cam timing. I'm new and I'm currently building a 302 on a budget and want to raise compression without milling heads but by pistons and I want to get close to 10:1. Compare. Also, the spark plug angle makes it a pain. Because its all been done time after time after. All in all, the addition of GT-40P heads to any 5.0 Mustang is a worthwhile venture, especially if you're on a budget (aren't we all) or shooting for the Trophy Stock title. Its always refreshing to see a FORD getting a little face time in your column, even if its a tired 302 with no great expectations of setting the world on fire when the dust settles. Best of all, no machining is required to install these on your stock cast iron heads! Cast iron GT40Ps as cast flow better than non-Ps due to revised plug location/angle. fordfan289, Aug 27, 2011 Stock valve sizes? But what we were most impressed with was the solid gain in torque over the smaller Voodoo cam from 3,500 and up. Here a comparison of different heads on a 302: I'm very happy with my GT40P. However realistically, with the amount of money spent modifying the gt40p heads or even those older 289 & 351w heads, you could have even better performing aluminum heads. Thank You. i know a guy who used to build race engines so he has all the right tools, how much would it help to get the heads ported and polished or anything else he could do to them. many thanks to all you eco-hippies giving me dirty looks and helping me feel llike an overall badass rebel. You need to check. You might even say its like flogging a dead horse without any animals actually being injured during my moments of sarcasm. Come join the discussion about restoration, modifications, NOS parts, troubleshooting, VIN codes, and more! It has underdrive pulleys, MSD ignition, Bassanni headers and forward exit exhaust. So I've got the motor and heads already for my maverick project. With. $139.99. Since the engine is nearly stock, we would want to choose a relatively mild camshaft with somewhat more lift and duration than stock, but again not going too aggressive. #3::: Do your homework,get quality parts,dont skimp. This modification will help your late-model GT40P heads work better with the old-school carbureted intake setup. All Ford Mustangs | Model Specific Forums, GT-40P Heads - 5.0 Mustang & Super Fords Magazine. Test 1: 750-cfm carburetor, dual-plane intake manifold, and stock camshaft. Ill do springs and a moderate cam and go for a good, dependable power plant. For the most part 302 heads and 351W heads are the same. United Engine and Machine sells cheap but decent pistons that will do what you're wanting. 68 XR7 & 68 M-100. In addition, the cam timing was designed for torque, with duration somewhere around 190 degrees at 0.050 with roughly 0.450-inch lift. check out the. For both the GT40 and GT40p heads, I STRONGLY suggest upgrading the valve springs. any input is apprecciated:smartass: Thank you for the info, if all I have to worry about is the plugs then I'm in good shape hahaha. Gasoline/Diesel all makes on earth & still doing it today with great pride.Feel free to contact me anytime. (its not their engine) i'd love to use these heads,. For those of you running a carb, or aftermarket intake, you already have a leg up in this area and should see even greater gains in power. Application Fits 1979-95 Mustang 302/351 w/ OEM Small Block Ford Heads I used Lightning heads on my 302, (GT40 not P) with stock rockers on a flat tappet engine. Ha! The later model distributors had a different diameter shaft than the earlier ones. Install a "wet" nitrous plate system (which carries both nitrous and fuel) onto the intake manifold and jet it conservatively for a 100 horsepower shot. 1985 Mustang GT Mild 331 4bbl 5 spd, 1985 SEFI LTD LX AOD. We then dyno'd the car without the fan to get some consistency and were rewarded with a peak of 316 hp at 5,500 rpm, and 348 lb-ft of torque at 4,000 rpm. Similar to regular GT-40 heads, the biggest difference between the two is that the P-heads feature a revised spark plug angle which extends the plug into the combustion chamber, putting the flame front close to the absolute center of the chamber, resulting in a smoother combustion process. Install a set of GT-40P cylinder heads from a late 1990's Ford Explorer or a set of GT40 heads from an early 1990's Mustang 5.0L. What did the heads flow? They are more expensive than standard head gaskets, but they also do the job and are worth the additional money. This is the main reason why these engines are not modified as much as the small block Chevy. Very true about finding them at the local yards. You gave me the info I was looking for, and I really do appreciate it. An aggressive cam will wake it up a bit. I wouldnt recommend reusing lifters though. P-heads have a smaller combustion chamber at 59cc, which will bump the compression ratio up on an otherwise-stock 5.0 engine. JavaScript is disabled. I was thinking the same but the enforcers are $647ea now so $1400 (inc tax) is the entry price for good set of heads. A good port job can set you back another $500-$1,000. Advanced: Daily Deals; Help & Contact; Sell; My eBay Expand My . The GT40 heads are a bit more versatile, working with the 5.4 and 6.8, while the GT40P (Explorer/Mountaineer) heads will only work on the 6.8 due to an interference issue. The Fora platform includes forum software by XenForo. The longer duration created a slight loss of torque below 3,300 rpm compared to both previous cams, but beyond that mild loss of power, the bigger Voodo out-powered its smaller cousin, cranking out a peak torque of 355 lb-ft at 4,300 (a gain of 7 lb-ft over Test 2) and charging to a peak horsepower of 376 at 6,000 rpm. He has worked as a tractor-trailer driver and mechanic, a rigger at a fire engine factory and as a race-car driver and builder. Rowe studied engineering, philosophy and American literature at Central Florida Community College. Stock 1989 5.0L HO pistons will work if you can find them. For all of us interested in Gt40p heads. I turned it because it was tired when I got it. Yep my **** is coming apart again Isnt life great! Related Resources Mustang Generation Nicknames: What Do They Mean? They also have emissions legal heads as well. With the engine reassembled, we boxed up our second camshaft and headed for Westech's dyno. Calculated compression to 9.8:1. +1 I would go with the regular GT40 heads. Well also assume that this engine is running stock exhaust manifolds. never messed with the timing, its at 35* total . This is an older thread, you may not receive a response, and could be reviving an old thread. #2::: Get advice from a reptile engine builder with experience(first flag for me is when somebody refers to an ENGINE as a MOTOR! Anyways, I know the gt40ps will bump . In an effort to preserve the history of the Early Fox Era, FEP covers the following vehicles: 79-86 Mustang and Capri, 84-86 Mustang SVO, 78-83 Fairmont & Zephyr, 83-86 LTD & Marquis, 80-88 Thunderbird & Cougar, 82-87 Continental, 84-92 Mark VII, 81-82 Granada. Our recommendation would be, rather than change the camshaft, you might want to look into adding a set of long-tube headers and a dual exhaust if the engine is not already so equipped. Again, assuming this is a nearly stock 5.0L with stock heads, the Weiand Street Warrior dual plane intake and 600 cfm carburetor, its important to not become overly aggressive and choose a big camshaft. Boy, were we surprised with the results. Performance & security by Cloudflare. Not when you can buy a set of Promaxx or AFR Enforcer heads for $1000, that already have decent hardware included. Works on all factory cast iron E7, GT40, and GT40P cylinder heads! A forum community dedicated to Ford Mustang owners and enthusiasts. There are literally a dozen or so camshaft companies that offer a mild hydraulic roller cam for a 5.0L Ford. Really hurt too. I have a 5.0 from a 1992 Mustang in my 65. As with Chevrolet's small-block engine, the aftermarket has had dozens of years to expand the range and reduce the cost of the parts they offer for this engine. Step 2. Most of the time, GT-40 heads are worth a good 20-40hp over stock heads. I must agree with Jeff Smith. Assorted screwdrivers, pliers and vise-grips. Yank a motor out of the junkyard, clean it up, add a camshaft, intake, and a carburetor, and see how much power we can squeeze out of it. Actually, making around 240 to 250 hp with a near-stock Windsor 302 will feel pretty good. *** 65 Mustang 351C 4v, AOD, 4.11 gears *** 66 Galaxie convert big block. We set the timing to 34 degrees and rejetted the carburetor to get our desired 12.5:1 air/fuel ratio. Would have liked to see a comparison done on the same short block using a set of decently-ported early non-Thermactor iron heads Tracy Blackford, 65 Mustang FB, 331 built with 289 H beam rods and 383W piston, 282S cam, self ported '70 351w heads, Dougs Tri-Y headers. I had those on my car before I upgraded and they were nice heads. Took me 7 hours to do one head.but they cleaned up real nice. Stock 93-95 Cobra shortblock (stock cobra cam), GT40X heads, 1.7 rockers, Edelbrock Performer RPM intake, Holley 650, and longtube headers. The Fora platform includes forum software by XenForo. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data. We guarantee plenty of burnout action when you add GT-40P heads to your 5.0 Mustang. Perhaps even more surprising was how well this engine idled, calmly purring with 16 inches of manifold vacuum at 980 rpm. 1983 Mustang G.T. Someone does make the Tri-Y's headers for the early Mustangs using the "P" heads. check out the. If you can find individual flanged headers like the obsolete MAC headers had, those worked really well with GT40P's. just curious. Mac and Ford Motorsport both make a GT40P spacific header. THANKS VERY MUCH! The engine was only rated at 215 hp, but it at least had 9.0:1 compression. The action you just performed triggered the security solution. For additional insurance, we also added a set of ARP head studs, which are stronger and offer better thread overlap than factory bolts, which helps prevent pulling threads out of a used block. i have a 302 engine from a 1977 granada and i am wondering if gt40p heads from an explorer will fit on this motor. If I get different urges later, Ill pursue those then. Shop by category. Instructions on porting the GT-40p heads here. You keep stock drivability, and stock gas milage if you can stay out of boost. Torque on the other hand isnt something to write home about. Its funny no one mentioned anything about ignition timing or components, Your email address will not be published. You just want to keep it out of detonation. I love my setup and it is very strong engine. Yeah, out of a bolt on upgrade, you'd probably be looking at 260-280rwhp ish with supporting mods.
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