Need a little help here please.

The ballast / coil wiring for the electronic ignition DOES NOT CHANGE going to electronic ignition, by this I mean electrically, functionally. Below is a simplified diagram of the system. IT DOES NOT SHOW the brown IGN2 coming from the ign switch, which attaches to the coil+ side of the ballast

The wire at far top right labled "existing wire" is the blue "ignition run" (IGN1) coming from the ignition switch

Ignition_System_4pin.jpg

IN FACT if the ECU should quit, in an emergency, you could unplug the ECU, drop a points distributor back in, and hook up the distributor wire to coil NEG. It will run just fine