New VR for Pertronix III?

The thing is, most all replacement, aftermarket 69/ earlier regulators are already electronic. The way to tell is look at the bottom of the regulator. If there is two great big resistors underneath, it's the old style mechanical relay. If not, it's actually electronic "in the same box." Some aftermarket replacement use a short squatty cover, and easy to spot

Below is a modernized electronic regualtor "in the old box"



Below is an original '69 / earlier mechanical one as evidenced by the two resistors



Also can be used, is the better quality and more expensive NAPA or Standard, which look different but hook up electrically Echlin VR1001 or Standard VR-128. I suspect that the famous Mopar "blue" racing regulator is in reality the same damn thing