Pontiac Cylinder Heads
 

Looking at building a legal SS engine for a 66 GTO with a 389. Edelbrock states the 60587 NHRA approved head is legal for a 389.
The only info I can find from NHRA states the 092/093 factory castings are legal.
I do not have a new rule book in front of me at this time...
Anyone know if these are legal?

Re: Pontiac Cylinder Heads
 

Be careful with those NHRA Approved SS Heads. I bought the AFR 1399 heads for GT/MA on my Mustang 302 and found out that even though the casting was approved, the valve sizes shipped with the heads were larger than stock and thusly not legal for SS. Approved aftermarket heads must have stock sized valves. Verify this many times over with friends, racers using these heads and NHRA tech. Mine are going up on Craig's List.


Edelbroch says these heads take 2.11 and 1.66 intake and exhaust valves. If that matches your application, you are good. Still check..I'm the ford dude.

Re: Pontiac Cylinder Heads
 

Not legal. Intake valve is too big.


www.PontiacEngines.com

Re: Pontiac Cylinder Heads
 

Sent you a PM.

Re: Pontiac Cylinder Heads
 

Head to Dwight Southerland's site and get registered. There is all the info you'll ever need including technical specs and classification. And it's in a much more presentable form than NHRA has. -Al


http://www.classracerinfo.com/default.aspx

Re: Pontiac Cylinder Heads
 

Thank you!!
Just registered, allot of good info.