put a permanent mark on your harmonic damper that represents 34º total advance if ... your damper doesn t go this far you can measure the ... timing marks on your damper and then using your measuring tape ... distributor so that the new mark on the damper lines up with the 0 on your timing ... you could line up the mark on the damper with the 2º atdc mark on the timing tab ... additional fuel when there is no vacuum at the base of the carburetor however ... application there will always be some vacuum so the power valves will not function ...