Reluctor and Phasing....

Looking at the design of the stock rotor, it would actually be very easy to build an adjustable one. Cut the top of the rotor off, maintaining the center stem with key. Use a nylon bushing with the same ID as the rotor center OD. Super glue the rotor top to the bushing. Drill/tap the bushing so a nylon screw can work as a jam. Mark #1 on distributor body, rotate engine so it's at desired initial. Turn rotor to trail edge of #1 and tighten jam. Once you run/test with a skeletonized cap you could super glue rotor together fully...