Picked up a 96 3406E with a busted crank at the rear. Haven't gotten the truck apart yet. What is my chances that the block is cracked? They drove it 60 miles with it broken and the shop diaged it as a bad clutch. The truck is not here yet which is why I felt to ask before I dive head first and get it half apart for no reason. Also how what is the best way to drop that massive crank out of the block in the frame? I don't really want to overhaul it as it was just done 300K ago.