heres an odd one for ya.....

Pull off your dizzy cap, line up the rotor with the #1 plug and see where the mark on the balancer is. It may be 180 degrees off, so you may have to spin the motor around again. But with the rotor pointing at #1 and checking to see if the mark on the balancer is at the timing pointer you can get an idea if your balancer has slipped or not.