Well, PPPPPOOOOOOOOooooooo, Fass lift pump....

Evidently the "on block" pump was removed and the "in tank" pump installed. I don't know yet is this supposed to be a dealer upgrade, or was someone selling this in a kit? I may fab up a bracket and put the fass down on the frame, but either way I'd have to pull the bed or the tank to pull out the in tank and either modify it or get a "pumpless" sender or something.