440 cylinder wall cracked

Sleeves are stronger than the block material. When you sleeve, it's part of a complete rebuild, you re-hone every hole to spec, unless it's some desperate "I need this cause I ain't got no money" 3rd world nonsense. It's so much cheaper to do it right the first time, instead of blowing everything up, repeatedly, and then finally doing it right, if you still have any money or salvageable bits left.

Would you like the story about the 3x blowed up AMC I've recently witnessed? Diamond is gonna send him Christmas cards. S/F....Ken M