Sleeving a cylinder pros/cons

The main issue would just be having enough material to put one in. I don't imagine siamese bore blocks are too easy to sleeve, but I'm not a machinist, so may be wrong. I had a sleeve put in my 5.7 Hemi when I bought it do to some scoring. I could have probably bored it out to clean it up, but then I really should have done the other 7 which would have meant new pistons all the way around. A sleeve meant I only needed to find one replacement.