70 Swinger Clutch safety switch,, maybe

70 Dodge Dart Swinger, 340 4spd. Anyone ever dealt with this ??? All of a sudden, the key does not turn engine over. No light dimming,,, when key is turned , just nothing. Battery cables are clean and tight, Maybe solenoid is stuck,,,, dunno' ? I looked in my big yellow Dart manual, hoping to find a diagram showing where this switch may be,,, nope ? I guess I will pull start it so I can get it into warm shop,,,,,ugh,,,