02-04-2007, 07:22 PM

a95toy

Senior Chief

Join Date: Nov 2006

Location: Calera Alabama

Posts: 261

Building a 72 400 pontiac

I'm trying to locate the parts i need to build a 9.0 to 9.5 to 1 compression 400.
I have the 7K3 96cc heads but the flat top pistons 12cc valve reliefs which only yield me 8.0 to 1.
I've looked at several pistons out there but it seems they are proud of them. Any help would be appreciated. I've got to resurrect this old girl back to her prime and better. Oh 1974 GTO, 400 muncie M21 4 speed. She is going to be a fun ride when completed.
thanks
T

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