The pontiac I just bought has a set of 462 castings on its unmolested 327 engine that was swapped in from a 67' car. This engine has never been apart and has been sitting for many a year. In looking up these heads, I noticed that there seems to be a lot of disagreement on them. Especially the chamber cc's. I have listings from 60cc's to 67cc's. Has anyone actually measured a set? I need to know the approx chamber cc's and won't be able to tear down the engine for at least two weeks. I am going to drop them on the 350 short block I have sitting here if they get a clean bill of health. Its a basic rebuild with cast 4 valve relief flattops 0.045" down in the hole. I am aiming for mid-low 9:1 compression with a felpro 0.038" gasket. That compression should work fine with the old 327-350hp cam I have here.