We have a runner! A couple weeks ago we filled the fluids, installed the seat, and took it on its maiden voyage. The Flowmaster mufflers we put on sound much better than the glasspacks it came with, the rear gear swap improved the driving experience significantly, and everything works. As difficult as it is to make a black paint job look good, we're glad we went with black. Also happy with the choice in seat cover - it really looks great in the cab and finishes off the truck.
We installed a temperature switch in the driver side head to serve as a ground trigger for the fans and it works great. The fans come on when they're supposed to and it cools down quick with the 4-core radiator and dual fans.
At this point, we have some imperfections in the clear coat to fix and apply the tailgate letters and do some more test driving and it will be ready for a new owner in the next month or so.