Just to keep the timeline current on this thread.
We had the wagon out this past Saturday. Maiden voyage with the new wiring. Did a small local car show and had a good day. The car ran well, didn't leave us stranded and got a top 25 at the show!

The new wiring seems to have done the job. The car starts every time, the volt meter stays steady at 14 volts, even with the air on, and she runs down the road at about 170.
She does wander a bit going down the road so I think I will have the steering box checked out and get her aligned. Probably too much toe out so that needs to be addressed before I do too many trips with her.
Mark