I installed a Bosch electronic ignition (square sliver box) from Matt at Midwest when I restored the car 12-years ago. The Bosch kit included a ballast resistor, which I also installed. I understand the resistor is typically associated with points to reduce current flow and voltage to the points. I measured a voltage drop from 12 to 8 v across the resistor.
Is the ballast resistor needed with the Bosch ignition?
Is the ballast resistor needed with the Bosch ignition?