upgraded duster alt, no gas gauge, coolant temp gauge, wipers, or dome light

OK, I had to ask. Hope you understand. Anyway..
The ignition switch sends power to certain fuses when in the run position.
Dash lights get their power from the headlight circuit, hot at all times.
I think if you'll solve the ignition switch wiring problem you may solve those other problems too.
I dont have 73 74 wiring diagrams but I can tell you the power supply to gauges from ignition switch is dark blue with white tracer. No fuse in that wire.