Just as an 'informational' shot, I cc'd a chamber on my 225 head. You can tell by the dusty stand how often I do this, lol. The chamber came out at 47.5 cc's. This is after a .070" cut off of a stock head. The valves and exh seats are new, so that helps reduce the cc's a bit over old ones that might have been ground.

I haven't cc'd the piston yet, but if it's .160" down, I'll have a CR right at 9:1 which is right at what I wanted.

good info, fixing to have a head cut too.