I have a z6, and i might have a good deal heading my way. A friend has p29s and rings. I know they work, but how high up will the compression ratio be, and how streetable will they be. Are we talking 91+octane booster ever tank. Would layering headgaskets help out much?

Another question is, how about the bearings. He has bearings (rods, mains, and thrust washers) for the dohc ZC that he is giving away with the pistons. Do they work with z6?