Mostly just the hassles getting everything to line up, and laying on my back on the passenger side to get all the wiring reconnected. I had the thing out of the car in 30 minutes or less. Took several hours to get it back in. No big problems, just awkward and time consuming.

I guess I should close this thread out. Replacing the dash harness assembly has fixed my electrical problems. I'm moving on to other things now.