Engine Whats All Needed To Run Gt40 Heads On A Stock 302?

[Exile]

I have a 91' 5.0 Mustang that is pretty much completely stock motor wise. I am looking at picking up a pair of GT40 heads that came off of a 96' 5.0 Explorer.

My question is would it be ok/worth putting these heads on my completely stock 302 motor? (with aftermarket intake, cam, ect to come later)
Are the GT40 heads a direct swap out for the stock heads? Or is there modifications that have to be done to run GT40 heads on a stock mustang 302?

 

[srtthis]

direct swap to a point

need new
head bolts
head gaskets
intake gaskets
thermostat gasket
valve springs
valve seals
valve cover gaskets
exhaust manifold gaskets
spark plugs
tube of RTV

 

[Exile]

Thanks for the reply!

Any suggestions on what size or brand valve springs/seals I will need?

 

[srtthis]

i have nitrle seals in mine... my GT40's were done by Rick 91GT and they are BAD ASS! my first pass i made has been my only clean once since i trashed the diff the 2nd time out with it. he can set you up with everything needed for the springs.

 

[f8tlfiveo]

If you do a search you can find an abundant amount of information on this subject.. Some good some not so good, but it's out there..

 

[Maryland Stang]

Are you sure that they're GT40s and not GT40P heads? The air tubes cannot be hooked up to the GT40P heads and remain functional. 40s have 3 bars on the front and Ps have 4 bars.

 

[srtthis]

Not all gt40s have the air bar in them mine for one do not

 

[Rick 91GT]

Derek, Viton Seals actually..lol

It really all depends what you want to do with the heads and how much money do you want to spend. The GT40 heads use 2 different height retainers since the valves are a different height (-0.102" different), actually these use a valve rotator and there is a kit out there to deal with that if you want to get rid of them. Otherwise you can swap out the 1 set of valves and make them all the same height as far as the lock location goes.

Here's a link to the one kit I was referring too... http://www.alexsparts.com/sb-ford-gt40-drop-in-valve-spring-kit-hyd-roller/

 

[srtthis]

Derek, Viton Seals actually..lol

smart ass! haha

btw should be back to cecil soon. diff should be welded and back in tomorrow