What Harness and any tips??

I have done several complete rewires and in fact am just finishing a rewire of a 69 Ply wagon and I will say this; it is not impossible however it does require a lot of planning and an understanding of how every switch, gauge, etc. works. Plus you will have to buy Packard series 56 terminals, probably several different crimpers, test equipment, etc. to get it done correctly.

I used after market harnesses but connect everything like it should be to include the bulk head connector. Its a lot of work to be honest, not super hard but very tedious. You really have to sketch it out and be able to read factory schematics.

As to hiring it out, I am sure there are shops that can and will do it but I have a car in my shop that was "hired out" and while everything works it is less than ideal.

So with all this said, I would ask the same question as others, why do you want to rewire the car? If it isn't burned up or seriously flawed, then you might want to repair what needs it. You can usually purchase wiring segments (front harness, engine harness, etc.)