Thanks for the idea. They do come in when opening the rear doors. I'm gonna leave it manual for backing up. They are really bright and I don't want to cause a scene every time I backup.
Relocated the switch panel. This keeps my center console/ doghouse clear, but is still within easy reach of the drivers seat.
Spent a lot of time pulling out the front interior and lining the cab to quiet things down. Also bulled the heat shield off the doghouse and lined it. Re installed heat shield/insulation.
It is much quieter in the cab, but still not really quiet. The 7.3 makes quite a racket no matter what, but it is way more reasonable in the cab. Ran some wires and added new front speakers / cheap Jensen single din touch screen head unit, a sub and some amps. Went middle/low end on the speakers. I felt since it is still not that quiet in the cab it would be hard to appreciate high end stuff.
Now working on a fold out platform for the back. Trying to keep it simple.