Re-Wiring 1975 Plymouth Duster

So I've rewired both of my Demons. The avatar car used my own design - started it with not one inch of copper wire in the car. Used HayWire wiring for the fuse blocks and source for all components. Darren there is great to work with. But as noted, aftermarket harnesses are generally GM-oriented (like the turn signal connector). They can be made to work and Darren can advise. I ran all the circuits and wiring to my design.
My 71 Demon uses Evans Wiring repop harnesses (except for the front end lighting harness which is M&H). Excellent fit and accuracy of harness lengths etc but I don't think he makes harnesses for 75's. A call to him can confirm. But as others noted, M&H harnesses are also known to be very good. My M&H front end lighting harness works but the breakouts were not in exactly the right places compared to the original i pulled out but I was able to make it work.
So you have to decide which way you want to go - repop or custom. Either will work and I found them to be fun adventures. Just keep EXCELLENT records for whatever you do. Especially for any/all mods you do to the stock wiring. If you go the custom route, of course you will keep great records!!

Good luck - gave fun doing it. You'll feel good pulling 50 yr old crusty, crispy, filthy wiring out and putting new clean harnesses in!!