Definitely don't get rid of the heads because of the chamber size... Just match up the rest of the engine so the heads can be utilized. I had a set of 670's from my 67 GTO sent to Warrior Racing in Michigan. I spent $1100.00 and had them ported, bronze guides, cut for teflon seals, new valves and assembly. When I got them back they brought a tear to my eye. They were gorgeous and not to mention they KICKED A$$ compared to the #12 RA III I was using. I was able to run these heads with 10.75 CR in a .030 400 zero decked with no pinging on Sunoco 94 octane. As for the chamber, they were pretty much untouched. Only the ports were done. There have been articles written that say the 670 are one of the best overall performance heads Pontiac ever put out.
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01-18-2003, 07:04 PM
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