this may be a little premature since i haven't pulled the piston out to mic it. I was wondering what the max overbore size a 312 block can handle. i've pulled apart a motor that has been sitting for years put turns over vary easy. It read x 100 on the piston the wear looks good on the cylinder walls. I mic'd a few cylinders they read 3.904 avg basically a 100 over with some wear of .007. So i'm hoping i can just polish and ball hone and ring and bearing the motor but the clearance to me seems like to much. So any helpful advice would be appreciated. If i had to bore the block it might be junk i don't know