wiring issues

Is there anyone who makes complete wiring harness for the a body dart 71

You "could" strip the wiring from a junkyard car.

Or, Have you checked with:

Painless Performance Wiring Harnesses

http://www.wiringharness.com/
or

painless shows one?
http://www.painlesswiring.com/assets/08Catalog/page25.pdf

or in sections from year one
http://www.yearone.com/serverfiles/fbshopmain2.asp?cat=1

Are you wanting a "resto" or something that works?

Try Ron Francis wiring. Its not resto but fixes the problems and uses relays whereever possible(horn,lights,ect..).