Well, I finally got to spend a couple of afternoons working on things after collecting all the parts. I underestimated how much time would be spent just sitting and staring at things before cutting wires and attaching them! (I also didn't buy enough AWG 16-14 x #8 ring terminals)
I'm probably about 1/3 of the way through (haven't starting rebuilding and organizing the switch panel on the left). But its starting to look a bit better organized. I'm using Dymo labels underneath non-adhesive lined heat shrink tubing for the labels, but its a bit tricky not to turn it black with the heat gun when shrinking the tubing! It also took me a while to figure out the ideal work-flow. (1) measure wire, (2) cut wire to length, (3) print label, (4) Trim label, (5) measure heat shrink against label, (6) Slide heat shrink down wire, (7) crimp terminal and heat shrink, (8) peel and stick trimmed label, (9) slide heat shrink up, (10) carefully heat the clear heatshrink to "lock" the label down, (11) attach terminal, (12) repeat.
The factory wiring had a big negative bus with a mess of connections, so I relocated it and shortened all the wires, tying it to the main fuse panel with a 6 awg cable (got to use my new crimpers and they ROCK).
I found some adhesive-based mounting pads that REALLY stick, even without prepping the surface with acetone first. I put one on the wrong spot and it took me 40 minutes of pulling and scraping to remove it! Nicer than drilling holes for hanging cable ties.