Distibutor interchangability problem

[~The Jester~]

I had great luck with my bronze gear. Problem is, plan on buying another one next year, they wear out rather fast. Call your local Ford dealer, tell them you need a steel gear for an '84 ditzy. Plan on drilling a new hole for the roll pin. Back then Ford drilled those shafts one at a time by an actual human, and each ditzy gear roll pin is not necessarily in the same place.

I can't believe those are different sizes. I was always under the impression that all 302's used the 1/4" oil pump drive, and that the 351w use the 5/16". I KNOW those are different. But going from 1 302 ditzy to another shouldn't be a problem, but obvioulsly it is. Is the shaft itself different diameter, or is it the outside gear diameter? Maybe becasue the '84 wasn't a roller cam, and had a bigger base circle on the cam? Beats me! Can anyone else shed some light here? Now I gots ta know too!