Personally I would recommend pulling the oil pan, jacking the tractor up a little bit, place a solid block of wood under one of the crankshaft rod bearing journals that is NOT pointed straight up and down, let the tractor down on the block with the journal resting on the block, fill up the cylinders with what ever concoction you like best and leave it for a few days. The weight of the tractor on the block ad rod journal will eventually turn the crankshaft - again the key is patience.