7. We find the advance slot of this points cam assembly measures 0.360 inch. That’s about the shortest we’ve seen on any production distributor. Our calculations suggest it will provide a maximum of about 28 crankshaft degrees of centrifugal advance. Over the years, we’ve found units ranging between 0.360 and 0.390 inch are fairly common in Pontiac distributors. Units in this range are generally ideal for most any street-driven Pontiac.