Any Pontiac guys on here? Need insight.

Post #42. Pic of the oil pump drive shaft. Rough end is quite normal. If you look closely, the last 3/16" of the shaft is smooth...& slightly larger in OD compared to the rough area. The body of the Pontiac dist is a tight fit in the hole, to a depth of about 2.5"; no way it can move around to rub on anything. The gear on the dist shaft is recessed so that the smooth end of the pump drive is a tight fit inside the gear to locate & centre the drive shaft.