Stuck pistons/Crank, any ideas?

Is it standing up or laying on it's side ?
I am sure you have shot the pistons down with liquid wrench or somthing like Blaster.
Do this top and bottom, Do you have a rubber hammer ? look at the stroke and find a piston half way down and put the handle of the rubber hammer on top of the piston and hit the rubber hammer on the head and it will try and drive the piston down, you may want to put three of the main caps back on to do this, I have herd that brake fluid does a good job also,.