Remounted Fuel tank and Fuel seperator/pump.
At first I was happy the tank and the fuel separator fit in the box with the tailgate closed. Then I was rethinking the whole thing.
I took a good look at the 308 gallon fuel tank. Originally there was a Cat 250Kw generator mounted to the fuel tank. The tank was the base. The actual tank is a double wall baffled tank with 38.5" extra frame built onto it to support the generator.
I cut off the left side 38 1/2" and I had only 1" to spare getting the tank in the box horizontal up against the back wall of the Deuce bed. The tank is mounted through the bed. I used 2" angle iron with grade 8 nuts, bolts and washers. I then slid the fuel system 6" from the tank and secured it the same way.
Now I have an extra 7' of usable space for anything to haul. This weekend I am going to plumb it in and go get my first load of free fuel with the new system.
Edit,
Just attached the TM for the Fuel Filter/water separator,24v slaved, pump.
The last 2 pictures is how I originally had the equipment mounted.