If you have contact breaker ignition you should not have much of a problem as the engine does not seem very sensitive to ignition timing. Set motor at tdc, put bean can on in the middle of its adjustment slots and move the crankshaft a little back! You need 6 degrees advance static, try it with a protractor on the alternator you can hardly see it. Electronic ignition is different, also I find carb set-up is pretty critical. Anyone of you experts can correct me on that? Well I might be wrong but it worked fine on my 79.