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NSSGTO · 04-12-2019, 11:08 AM

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?

04-12-2019, 11:08 AM	#1
NSSGTO Junior Member Join Date: Feb 2010 Posts: 58 Likes: 10 Liked 27 Times in 18 Posts	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?