Who makes the best sleeves for 348-409? What type of sleeves has everyone used? Are they used in every day drivers and racing? Do they make wet sleeves for 348-409 engines? Had someone ask me about putting a sleeve in a block. I haven't had to do it yet myself but there isn't much information about it other than several people have done it. To what extent was it done? Meaning was it used to fix a thin wall, bad scoring, or a cracked/ busted cylinder? How bad can a cylinder be where it can still be fixed? I would guess if a cylinder is cracked (let alone with a hole in it) then the entire block is junk. Thanks for any input!