Duster Wont Start

I have a 73 Plymouth Duster that I have restored. It purred like a kitten until 1 week ago. Same thing is happening with me now. I replaced the ballast resistor, ECU, Magnetic pickup, ignition switch. the wiring under the dash to the bulkhead connector. running electrical tests I get 9.5-10 volts on run as it should be but like 5 on start. Obviously not enough spark to start but IDK why or where it search. It's almost as if it goes through the resistor twice? maybe a shorted wire ing my engine bay. I'm going to tear it apart tomorrow. But ya I get like -3 volts on the start for some reason, we thought it might have been the coils kickback response or something.