Hello!

As far as the fuel sender goes, look up someone that can restore the original. DO NOT use the chinesium after market units, or the retaining rings. A lot of the members here have had nightmare experiences with that crap. BTW, very nice 67 post car it looks to be a very good starting place.
I never knew there was such a thing as restoring a fuel sender. I will look into it. Thank you.
It will be a year before I touch the Dart. I have learned that I do better with one car at a time. For now I’m just going to gain knowledge and ask dumb questions.