Thought I'd add this to the thread.
I just finished cc'ing a 230 cylinder head, P/N 1676337-1, I believe it's a '57-'59 head with an original compression ratio of 8:1. The chambers ranged from 68.1cc to 76.5cc. I believe my #'s are good within a cc. The thickness of the head at the corner bolt holes was 1.801", 1.800", 1.795", 1.793". The thinner side was on the valve's side of the head. There was some distortion/wear from the bolt bearing on the head's surface, so these #'s have some variability.
I'm very interested in what a stock M37 6.7:1 head's combustion chambers measure.
