A few years ago, Tom Langdon, before he retired from GM, was kind enough to provide me some combustion chamber cc's based on casting numbers:
3836848 79.1 cc
3835913 86.2 cc
3836850 86.2 cc
3703570 95.5 cc
So far I have not been able to sort out what changed, if anything, to get the later 235 motors to 8.25 CR.
