I’m all done now. Everything is installed, wired, setup and tucked in. It was quite the job but I’m glad I did it myself as it gives you a much better understanding of it all.
I did add a new antenna mount and antenna. Also wired in another switch to handle the two speed fan that blows air onto the windshield. It’s the old bus heater that I left in from when I had the inboard. That switch on the dash outlined in yellow was more work than I guessed but it all works.