I hope there's something left to rebuild after all that hammering! It's not uncommon to bend rods, or damage the crankshaft with a lot of brute-force disassembly. Have all the parts checked for straightness/alignment by a good machine shop. It's slower, but a lot less stressful, to soak everything with a good penetrant like Kroil, and carefully break the parts loose with a pry bar at the flywheel and a hardwood block and a big hammer on top of the pistons, freeing up the rust bond between the rings and the cylinder walls.
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!