1973 Scamp won't start in start only in run. With a Twist....

Today's update. Started the day by replacing the starter out of necessity. Couldn't stand all the extra cranking I guess.
Replaced the ECU and coil and ballast resistor just for giggles. No change.
Started doing resistance and voltage checks. Disconnected the ignition switch connector under the dash. 12.5 volts there on the brown wire in crank 12.5 volts on Blue in run. Check resistance on the wires Downstream to the ballast resistor less than 1 ohm. Checked and clean the bulkhead connector just in case.
Reconnected the ignition switch connector under the dash unplugged the connectors from the ballast resistor voltage there 12.5 on Brown and 12.5 on blue.
Plug them back into the ballast resistor check voltage at the coil again 10.5 volts in crank 6 volts in run.
Ballast resistor 1.2 on one side. 5 ohms on the other. Scratching my head.