I just checked my compression on my 264 ci engine and the read out ranged from 100, 95 and 90 was the lowest and engine starts fine and does not smoke. The rear main leaks and that is about it. I am restoring a 55 Buick Special. I will drive it about 3 or 4 thousand miles a year. There's a certain good feeling to know if you are driving a solid car or not and I am factoring that in to a certain extent in regards to making a decision, whether to buy a rebuilt 322ci or not, for $5000. It would have everything new including rods pistons, cam but not new crank. All rebuilt heads etc. what do you think? any help appreciated.