Let's see /hear what everyone is running between those heads. I opted for a Comp Cams XE274H.
67 WT 406
Port and polished
Edelbrock Performer Rpm
Butler CC XE274 hyd flat tap
All work performed by a phenomenal builder in VA.
I'm having concerns with compression ratio limits to '69 #62 heads off a 428. So I bought a '70 400 to build and throw into a '68 Tempest. I was told the motor was stuck, but have found it's actually .30 over with new pistons, cam, timing chain, and crank. The heads are press in stud #16(I have...
1964-1974 Tempest, Lemans & GTO General Discussion
Hello everyone. I recently purchased a 1967 GTO. The car originally had a 400ci with 335 hp “YS” code with an automatic transmission. However it now has a 455ci the engine based on the numbers next to the timing cover (starting with 22P) it was originally in a 1972 Pontiac. This 455ci has “YC”...