Ignition help needed. 1973 Duster

When the ignition switch is turned to start, it sends 12 volts on yellow wire to starter relay and also sends full 12 volts to coil on another wire (brown or blue, I forget). When the ignition switch is in run position and you jump the starter relay, the coil doesn't get full 12 volts. Engine might not start on the reduced run voltage ( the other of brown or blue ). If choke is closed and you've turned it over enough it may now be flooded.
I have found that when the neutral safety switch is slightly out of adjustment and doesn't complete the relay ground path with shifter in park position, it will complete that path with shifter in neutral position.