Maybe the piston got stuck because the rings are bad?
Let's say I manage to get it unstuck, and can push it back more than a revolution. Should I fire it up and see what happens? I was hoping that giving it some exercise would somehow make everything seat a little better and maybe bring up the compression numbers, but I'm sure it won't be by much if any. I've checked #1 about four times and get the same 55psi...
It looks like I'll either need a new motor, or rebuild.