my pulley wont slide over the crank, and the threads arent long enough to engage the threads on the crankshaft. how tight of a fit should the crank pulley be? looks like this truck was "repaired" years ago and im just cleaning up a mess. i need a new starting jaw or a bolt, my radiator is too tall to use the hand crank anyways so anything would work. threads are ok in the crank, ive got a back up crank if that was the case but im trying to solve this without going that deep