Ok, here goes:

You won't find anything in the Haynes manual because resleeving isn't a DIYer job. The block has to be heated and the sleeves removed with a sleeve puller. While the block is still heated, resinstall the sleeves. Then each cylinder has to be bored to each piston, because the sleeves are not going to be the correct size (cylinder diameter)

If the pistons are good there is no reason you can't reuse them, check psiton diameter at the base of the skirt, and check piston ring to groove gap to make sure they are not worn out. If so then you'll be looking at new pistons and rings.

So those are my thoughts!! I looked into resleeving before I decided to go with a used motor, because if I was going to spend all the money to go that far, I was going to put in new pistons too!