Ok, I am not sure I showed my solution for the ignition power. Based on the suggestions here, I went with two 4 terminal relay approach. Then used the blue and the brown wire from the wires that goto the resistor. Blue has 12v during run, Brown has 12v during start. The blue and brown wires are only used for triggers and pass thru the relay to ground. The relays get a 12v which will come from a breaker protected power distribution block (such as the one from MSD) straight from battery. There is the possibility of replaying the relays completely with the msd power distribution block. More on that later.
So in further investigations after finding the below charging circuit diagram, both the blue and the brown wire come directly from the ignition switch. In the event of the blue wire, it also goes to a field post on the alt as well as a post on the voltage regulator. As the 12v source is coming from the ignition switch, I am going to assume that its safe to use in the method I am, unless someone here believes I am making a mistake.
Meanwhile, I am digging into the harness and cleaning things up. Mainly sorting out why wires were cut and correcting them or notating. The orange wire off the harness connector that goes to the ignition switch was cut on the switch side. Come to find out that it was no longer needed as there wasnt a automatic shift indicator which needed lighting. I will definitely keep that in mind so if I install a gauge (such as a wideband air/fuel) one from autometer, I now have a power wire for lighting.
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