Well, that looked good UNTIL I looked closely. No gap between the reluctor and pickup. Pulled the distributor and the gap was there and I couldn't duplicate the issue. The bushings didn't feel especially loose, either. Looked in my pile of parts and found, not one, not two, BUT three DC/MP small block distributors. One of them looks clean and ready to go.

BUT, one more question while I'm at it. I pulled out one of "B" motor electronic distributors (one that I have taken apart). I see the pin that locates the reluctor, but the reluctor is loose on the shaft. I'm sure it was tight when I pulled it off. What keeps it tight to the mechanical advance piece?