pertronix 3 doesnt use a magnetic pickup. or any kind of collar on dizzy lobeSomething I learned on the Pertronix is that the magnetic rotor can sometimes not align with the pick up unit.
Also, on one, I had to move the pickup ridiculously close to the magnetic rotor. You might want to check those two things.
I designed and printed a better rotor for these conditions but the plastic I used is biodegradable so it's not fit to send to anyone. Someday I'll print a bunch in ABS and offer them as a substitute.