Actually the dart has been worked on, more than the polara.Yep, that's pretty much it.
Pretty much. Assuming replicas are not available or out of price range.
Label connectors and remove factory harnesses (plural) one by one.
Layout factory harness & remove tape,
Make a list of wire color, size and lengths needed to buy.
Buy new terminals,
Only Buy new connectors if needed.
One harness at a time, replace every bad wire and/or terminal connection.
The only connection that can't be done at home like the factory is the welded splice in the main under dash harness.
Here's where Kieth's suggestion of having a good used harness might be easier for a guy in your position. There's other ways to do it - but however its done, that's a very important junction.
not really concerned about factory looks. More about functionality. I did manage to find a factory wiring diagram and going through it now.