You should probably just take the pusher bolt out of the puller, tighten the puller as much as possible, install the pusher bolt with hand tools. DO NOT use an impact on it. Get the pusher bolt good and tight then whack it with a 2lb hammer. Just a good swift blow will do at the head of the pusher. The flywheel will sometimes shoot off the crank, other times it will just bump off a 1/4", then just keep tightening the pusher bolt until you can pull it by hand.