Mopar 400 block 8 sleeves
What is minimal cylinder wall thickness acceptable before sleeve gets installed? What is too thin?
If you can keep .080 wall in the block and keep the sleeve at .080 at finish size that fine.
Look at an aluminum block and how sleeves are set in those. It is nearly impossible to keep a sleeve straight and round in an aluminum block. The block itself moves all over the place.
Even with the very best sleeves I could find, even correcting the bores before setting the sleeves, they don't stay round.
So as long as you use a quality sleeve and keep its wall thickness as thick as you can, you can get pretty thin on the OE cylinder.
And, before I forget, you need .0007-.0009 press on the sleeves. Any more than that and it just moves things around. If the sleeve is set as far down the hole as possible so it sits on a square ledge around 100% of its diameter, it will never come out
Some guys love flanged sleeves. I don't use them unless there is no other way. The flange weakens the deck a bunch and then you have the flanges overlapping. PITA for zero gain.