New Classic Owner
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Joined: Jul 2013
Posts: 1,685
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From: Oregon
They should have 3 bars cast on the ends of the heads. My 40P heads have four bars and in the valve train area they are cast "GT40P."
From what I can tell yes the heads you describe will work on a 302. Can you post pictures?
From what I can tell yes the heads you describe will work on a 302. Can you post pictures?
Posting Guru
Joined: Jul 2013
Posts: 1,685
Likes: 2
From: Oregon
What I could find quickly off a mustang site
So, people use the term "Cobra heads" very very loosely - esp on Ebay - when selling or describing their GT40 heads. The only true F1ZE-AA "Cobra/SVT" head are on the very limited production Shelby AAC cars... if you have F1ZE-AA stamped heads on any other Mustang - rest assured they came off a '96-'97 Explorer and are just Marine heads. Better term when using the F3ZE-AA/F4ZE-AA are SVT (Specialty Vehicle Team) GT40 Ford Motorsports heads since they were used on both SVT Cobra Mustang and SVT Lightning trucks.
So, people use the term "Cobra heads" very very loosely - esp on Ebay - when selling or describing their GT40 heads. The only true F1ZE-AA "Cobra/SVT" head are on the very limited production Shelby AAC cars... if you have F1ZE-AA stamped heads on any other Mustang - rest assured they came off a '96-'97 Explorer and are just Marine heads. Better term when using the F3ZE-AA/F4ZE-AA are SVT (Specialty Vehicle Team) GT40 Ford Motorsports heads since they were used on both SVT Cobra Mustang and SVT Lightning trucks.
Posting Guru
Joined: Jul 2013
Posts: 1,685
Likes: 2
From: Oregon
Check out the third picture in this add are the heads in question marked the same? From what I read sounds like the heads you have are gt40's?
http://www.ebay.com/itm/87-93-94-95-Ford-Mustang-Complete-GT40-5-0-Cobra-Cylinder-Heads-302-3-Bar-/151146454665?pt=Motors_Car_Truck_Parts_Accessories&hash=item233107de89#ht_101wt_1255
http://www.ebay.com/itm/87-93-94-95-Ford-Mustang-Complete-GT40-5-0-Cobra-Cylinder-Heads-302-3-Bar-/151146454665?pt=Motors_Car_Truck_Parts_Accessories&hash=item233107de89#ht_101wt_1255
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Senior User
Joined: Oct 2013
Posts: 130
Likes: 0
From: Metro Detroit
I no idea...I didn't really look at them all that much I was picking up other parts at the time and was not really thinking about the motor at that time...I just happened to see them and called him on them a few days later and asking for the casting code on them.
Cargo Master
Joined: Dec 2004
Posts: 2,232
Likes: 3
From: NE Texas
Yeah I know we are going to tear the motor down first to make sure the block is in good enough shape for a rebuild be for ordering parts. the tear wont be happened for another few weeks. Were thinking if it has not been touched we are going to have it punched and honed 10 or maybe 20 over.
Now if I were to buy that kit it doesn't come with springs for the head. Would these spring be best?
http://www.summitracing.com/parts/tfs-2500100
what would you recommend for adjustable rockers?
Now if I were to buy that kit it doesn't come with springs for the head. Would these spring be best?
http://www.summitracing.com/parts/tfs-2500100
what would you recommend for adjustable rockers?
I would not assume that it will need boring or the crankshaft turned. I have built enough engines that I have learned that it is impossible to guess the internal condition without disassembly and measurement. Don't make parts buying plans until it is disassembled, measured and magnafluxed and closely inspected.
Not only do you want to know what size bearings, rings and such you need, but you want to MAKE sure that you don't invest a bunch of machining money into a casting or forging with flaws, cracks or otherwise substandard.
The tear down is basically exploratory surgery.
Hope this helps.
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Senior User
Joined: Oct 2013
Posts: 130
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From: Metro Detroit
Welp...one step closer. I just picked up a drivers side door for the truck. Just waiting for the cab corner, floor boards and rear quarter panels to show and it will be to having the body work done.
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Senior User
Joined: Oct 2013
Posts: 130
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From: Metro Detroit
if your gentlemen are still following, I got lucky and found a 1971 302 rebuilt motor with zero miles on it for $250. The guy who sold it to me owns a shop where he restores cars. He told me he restored every thing in factory specs along with the heads. the only change to the motor was a RV cam to add some extra power. The only thing I now have to buy for it Is the dual plane intake, 600 carb and headers.
What headers would you guys suggest using with this 71 302?
What headers would you guys suggest using with this 71 302?
Lead Driver
Joined: Dec 2012
Posts: 7,877
Likes: 49
From: Tennessee
. Hope the builder knew what he was doing , good luck , and happy build !
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Senior User
Joined: Oct 2013
Posts: 130
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From: Metro Detroit
lol hahah I know...Right. He said the same as me that its an old school add on. I still might go with a different cam. I really had my mind set on that comp cam. OBTW....the guy with the gt40 heads is now asking way to much money now that he knows what he has.
Lead Driver
Joined: Dec 2012
Posts: 7,877
Likes: 49
From: Tennessee
I do not prefer hedders , but , I have used headman hedders with good results . Pace setters , I think , on some tuners years ago . I go stock and quiet now . Call me old , I even made my CB550 quieter ! Thinking about putting a quiet pack on my 4 wheeler ....