[rotorwrench]

A sonic check will tell how much will be left if you want to bore to a certain size. A person can always bore it way out there and sleeve is for specific wall thickness but that stuff is a lot more expensive than just boring it far enough to keep the walls a safe thickness.

I hope Tod casts some new blocks one of these days so a person can feel a bit safer about corrosion. You ever know what some folks ran for coolant in these old engine blocks. Some could have some pretty deep corrosion pits in there.