Re: Wiring HEI distributor with mini starter
A diode is workable. Please be aware, they can fail, both ways, no continuity, continuity both directions.
Please be aware, most of the mini-starter manufacturers offer a solenoid for their units that has the R terminal, simple swap solenoids. Contact them directly.
If no workable IGN terminal, remove bulkhead connector on firewall side, new terminal from GM, swap resistor wire terminal to full voltage wire, tape off resistor wire connector. This will give you full battery voltage power to the HEI on run.
Diode off the S solenoid terminal, or, alternate solenoid.
The resistor wire in our cars is silver stranded for the resistance, and about 7 feet long, I do not recommend removing it from its loom, but simply taping both ends off and then, to the loom, so it remains in the loom/car.