Can motor be UNSTUCK????

I have seen in the past a crude but effective method. Pull the plugs and put diesel fuel or Marvel Mystery Oil in each cylinder. Put a socket and breaker bar on the crank bolt, place a piece of pipe on the breaker bar and hang a weight on the end of the pipe, we used to use a concrete block. Let gravity work on it. It will take some time as the pipe slowly moves down reposition it and let the weight work on it some more. It will take time but will do less damage to the cylinders in the long run. It sounds kooky but I have seen it work more than once.

Once the motor turns freely change the oil, put some plugs in it and fresh gas and give it a try.