The early balancers ('67 and before) have the timing mark on the inner hub that's directly attached to the crank, not on the outer ring that can slip like on later balancers.
The timing portion of the balancer can't slip so you can rule that out.
Try setting the total timing at about 36 degrees with the vacuum advance line disconnected and plugged. Rev the engine until the centrifugal advance is all in (probably around 3000 RPM or so, the timing mark will stop moving when the advance is all in) and set the timing at 36.
|