Quote:

To the OP:

Your assumption that later slant six blocks would have thinner walls isn't correct. There seems to be no best year for blocks, if you are going to spend major bucks on a block I'd sonic check it first. And because Slants are bore-limited, I'd look for one that could be bored out more if your are going NA.

R.



Bore limited? How much? All blocks are bore limited.

Just about any slant block will go +.100. I know of one that went +.190 without hardblock.