Real Skid plates that protect the transmission as well...
Stocks ones are a little thin and don't extend back far enough.
Pop out windows on the rear doors... how hard could that be?
Redesigned rear door, the back of the truck is a dust magnet. You can't get anything in or out with out getting dirty, the back bumper collects the dirt.
Adding a air deflector on the roof rack like the old vista cruisers had or even some of the mini vans to remedy the majority of the magnetism