What’s to understand? Nothing on the orange or chrome MP ignition boxes is adjustable. They need a good ground and solid wiring, send them the correct voltage and a good signal. If something is wrong with them beyond that it’s internal electronics and they’re sealed units.
Seems to me if they were so great everybody that drives distances with that ignition system wouldn’t have a spare box and a ballast in their glove box, and yet that seems to be the common thing to do.
A 2,800 rpm pump. Yeah, wow, there’s a build to copy for a muscle car. Totally relevant to the conversation.
I mean, the faulty orange boxes that would break up above 4,500 rpm would work fine for that, defective as they all were.