Not getting 12 volts to coil
I'm not understanding what red terminal to the fuses you are pushing on.
You'll have to correct me if there was a change for your car.
On everything I have, the accessory position is the other direction from on and start.
So I think your switch is OK so far
p2. 1975 Operator's Manual Plymouth Valiant
Speaking of which, you'll have to say what wire is actually where on your car. The Shop manual shows Ignition 1 as the brown wire on that connector. Elsewhere (and on other drawings) Ignition 1 is the Run wire and is blue or blue with a stripe. Ignition 2 is start. Lets just call them Ign run and Ign Start. Ign Run is almost certainly the blue wire.
So make note or photo what is actually on the car..
??