you do know that fastfish1967 is correct in the fact that 1975 and older 360 blocks have thicker cylinder walls...other then that your right all years suffer from core shift.
It's nice you agree with him. I'm aware they were supposed to. Just like the early '71 360s that supposedly had the 340 bore cores. It is a fact the quality of iron was changed, which was really why the casting cores were changed. But, I also own a good sonic tester and all those with the exception of the iron quality are entirely false due to poor casting quality. You're right, they were supposed to be. But reality is they cannot be considered on that factor alone. You have to measure each bore, in each block if you really want to know, as opposed to believe.
