1973 Duster wiring harness compatibility question

Much of the Duster's under-hood wiring is brittle and cracking. It needs to be replaced.
She is a 318 (but getting a 360 in the coming weeks), 904 Torqueflite, power steering, power brakes.

I found a wiring harness from a 1973 Dodge Dart locally but it's a slant six car. Would it work in my V8 car?