Stuck pistons/Crank, any ideas?

If you do not have an engine hoist, put some mechanical advantage to work for you. If you want to get the block up on a work bench and have no friends handy, you could rig up a hoist by using some chain, a long 4x4, and something sturdy to use as a fulcrum. I had to do this once. Because the work bench height was high, I did it in stages using milk crates as the fulcrum. Lift the block onto a crate, then add another crate to the fulcrum and then another to the one under the block. Once the block is high enough, you could roll it onto the bench from there. Just be careful to keep the crates stable when jacking.

I have since then purchased an engine hoist on sale from Harbor Freight.