Advice on stroker build with cracked cylinder

That crack doesn't mean jack crap. You are overthinking this and mentally masturbating yourself into a corner.

I can't count the blocks I've sleeved. I've sleeved them with holes in the cylinder walls.

Use a .125 wall sleeve, sleeve it and move on.

Yeah some folks just like to drive themselves insane. You can what if yourself into a coma. Why?