I messaged
@BergmanAutoCraft earlier and he told me that the adjustable rotor he tried was too big to fit in his distributor. I think I may have an alternative, I'll know in a day or so. Here's the info I have currently.
This is, the best I can tell, the rotor used in the pro flo 4 distributors. It matches up with the one in my car, exception being the color.
Edelbrock Replacement Rotor #22733 For Max-Fire Distributors, Chevy V8
This is the rotor from an MSD that appears to be an almost identical copy.
MSD 8467 Racing Rotor MSD Billet Distributors
MSD makes an adjustable version of the one above, model 84211
MSD 84211 Rotor Phasing Kit for MSD Distributors
I was able to order the non-adjustable version p/n 8467 for pickup tomorrow at NAPA. It was only $11, so no great loss if it doesn't fit. If it does work in place of the edelbrock one, I plan to order the adjustable version and try it as well.
Pictures of the rotor out of my car below for comparision.
View attachment 1715723516 View attachment 1715723517
