[wwest]

"80 SC with a rev-limiting distributor rotor..

WHY....?

The rev-limiting is done electronically.

CDI ignition shuts down at rev-limit and "trigger" signal goes to the rev-limiter which "switches-off" the fuel pump if/as the engine reaches over-rev.

BANG...!! if you reach the rev limit rapidly, under full thrust, feels as if something broke, something SERIOUS...!

Otherwise, slow RPM rise to over-rev limit kick-in, just prevents the engine from over-reving due to being under power.

If there is such a thing as a rev-limiting rotor then it will have a MATCHING, "paired", distributor cap as it would be EXTREMELY impractical, unwise, to change the base timing.