Turned out the puller I made failed in service. But all sleeves are in, pistons and head back on and if I can figure out what's up with the valves I'll be firing it up this weekend.
The dry ice/acetone worked. I bought 5 lbs of dry ice, 2 would have done it. I put a few chunks in the 1/2 gallon cooler and added the acetone slowly and watched it bubble. Kept adding dry ice until the bubbling stopped and the chunks just sit there, which means its cold as its going to get. Then I slowly put the sleeve in. It was about 3/4 covered. Left it in about 15 minutes or so.
They did not just drop in but had to be driven in with a hammer and wood block. As I progressed I got more comfortable with driving them in and the third one took about 2/3rds less time than the first. Also, I wasn't sure about whether to put oil on the sleeve but concluded that probably not. I did wipe off the acetone with a towel on the 2nd and third and I think that helped too. Bottom line is that freezing did help. Total cost: dry ice $5, cooler $5, acetone $12 (can reuse) so $22.