[Michael C Henry]

Think of the drive pin as a built in weak point lika fuse. The pin should be a roll pin but more than likely it was a spring pin. Other than the inconvience it will only trake about an hour to repair and get back to the fun. I bought my replacement true roll pin from MSD through Summit. I'd get an extra pin or two drilling a larger hole weakens the shaft and moves the weakest point to someplace else. Other than it's timing it is not hard to mrepair. When the pin breaks, you loose the ignition and the engine coast to a stop. A magnetic drain plug could catch the pieces. It happen to me but I was in the back yard.