I've been trying to install my pullys for awhile, I can remove the waterpump one but once I get to the crank pully i can't get it off, I have the harmonic balancer puller and I keep twisting it but the bolts that pull it keep getting stripped and the stupid pully won't budge any help guys, anyone have any suggestions, these pullys have been sitting in my room for 3 months cuz i cant get that crank pully off.. thanks