Re-Wiring 1975 Plymouth Duster

This is my first post, I am stationed at an Air Force base in New Jersey, originally from CT, my father passed down his 1975 Plymouth Duster to me but when I received it, there was no power running to the rear lights, front lights, or dash. Upon investigation I found a mess of wiring (including ridiculous speaker wiring and random old wiring leads spliced into old wires) :eek:. I have decided to rewire the car myself, this is my first rewire job, so I'm nervous to say the least. any pointers or schematics (I have not been able to find a wiring schematic for the 75 Plymouth duster), or any insight that you all can give for a smooth rewiring job?

Attached images show the car.

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