Idont know how old this is. But you can by pass your ignition switch by wiring a toggle witch to the 12 volt side of your ballast and to a 12 volt source. That can be your ignition switch i have done that alot on mopars. If i were you i would by pass the ignition switch with a toggle switch and buy a brand new ballast resistor and buy new plugs ngk work the best for me in chrysler engines. And throw a choke on it and see what happens from there.