[Roadtrip]

Mainline - If you have a ballast resistor on your 73, then either it's been added by the PO or Alfa switched production standard in the middle of the model year (could it be???). In any case, go with what I've already written, which is WITH ballast resistor.

Test the coil with the ohm meter. After you disable the fuel suppy pump and re-test voltage at the coil +, you could also try just running a hot lead direct from the battery positive post to the + on the coil and see if it starts. That would eliminate the coil onward as a cause. From there, you're going to have to chase wires back and see where the voltage thief is.