since you've already installed the pistons in the new sleeves, you already know this but i'll mention it for the rest that are following this thread.
once the sleeves are installed, turning the engine to install pistons will cause the sleeve to come out on a cylinder that already has its piston. you need to hold them in place with a block on a head bolt to keep everything in its place.
on wet sleeve engines, i leave the oil out of the pan and the plug out after putting in the antifreeze....just to be sure that nothing is leaking past the o-rings.
you can make a puller using a length of 1" fine thread B7 rod, a couple of blocks to raise a plate off the deck, a couple of 1" heavy nuts, and sleeve discs of the correct size. i have mine machined with two steps, one top and one bottom. in the case of the "A" engine, the top step is 2.995 dia, the bottom 3.120 dia, and the center 3.250. that way the discs slip up into the sleeve and cannot score the block by slipping sideways. the reason for two steps? so if i ever need to remove the sleeves from a super A1 or a super C with 3 1/8 pistons, i'll automatically have the correct sleeve. its not that important on a wet sleeve engine, but on and H or M dry sleeve it is, because they come out harder.
to reinstall dry sleeves, freeze the sleeve and heat the block with a torpedo heater or the like. be ready with a block of wood to seat the sleeve, if necessary. many times they simply slide in to place. if a dry sleeve will not stay in the block when cooled, you can put a bit of med locktite around the sleeve and slide it back in.