[boblyon1]

A lot a great replies. I will have it back to the builder tomorrowmorning. Seems that there is some consensus that the hold down clamp might not be strong enough but I will also look at the possibility that the pin has sheared or that the gear is too far down on the shaft. I probably should have mentioned that the MSD coil is mounted vertically.

The rebuild was done because the distributor gearing on the cam was all chewed up. I had strongly suspected that a mechanic (I was traveling out of state) tried to install the wrong distributor (perhaps for a Cleveland 351??) but he claimed the damage was gradual. But I wonder.

Anyone have any other ideas?