Gotta get the crankshaft turning, or unbolt the whole works from the bottom by disconnecting the rod caps and main bearings, and take the crankshaft out. Soak the cylinders with Kroil, and use a BIG pry bar on the flywheel. Maybe even heat the piston tops with a rosebud torch to make them move.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!