Welcome home 1973 Dart Sport!

Wow, that is a nice car!
Drive train swaps are easy, major rust repair isn't.
I would leave the small amount of rust on it there as is.
You are going to save thousand$ alone on that.
Personally, i would put white up and over stripes on it and a dual snorkle hood scoop.
I love the Dart Sports.......
DON'T sell it, you will regret it for sure!