This guy was also working on '71, but with a Ralley dash.
[URL]https://www.forabodiesonly.com/mopar/threads/1971-duster.534041/post-1974225570[/URL]
Some of those have some subcircuits for headlight on reminder and such that can get tricky.
If you trouble with one of those start a thread about tjust hat and there will be a bette chance people who know about it will see it.
Here's some reason I suggest eventually adding a relay harness.
[URL]https://www.forabodiesonly.com/mopar/threads/headlight-short.547032/post-1974417873[/URL]