The most important upgrade a tow vehicle needs is more fuel capacity. After all, fuel mileage can be cut in half, depending on how much weight you're towing. Whether you're towing heavy, or refueling equipment or a friend's truck, you don't want to go back into town to top off your factory tank, so having extra fuel on board is a necessity. This brings us to our '97 Power Stroke towing rig buildup. Although the truck already had two fuel tanks that when combined, could hold approximately 35 gallons of diesel, we wanted to double the amount of fuel onboard. In addition, we also wanted to have enough room for all of our tools.
For utmost versatility, we contacted Transfer Flow for one of its toolbox and fuel tank combos. Transfer Flow sent us one of its 30-gallon toolbox and refueling pump systems (PN 080-01-12975), which would not only give us the option to shop around for the best diesel price, but at 17 1/2 inches x 19 1/2 inches, we wouldn't sacrifice much bed space either. Courtesy of some very detailed instructions, our Transfer Flow system basically installed itself in less than two hours.
 Transfer Flow provided all...  Transfer Flow provided all mounting and electrical hardware with its installation kit, including an in-depth 12-page instruction manual, which also lists the tools required to get the job done. |  First, we placed the toolbox...  First, we placed the toolbox and refueling tank in the bed of our F-350 and positioned it 1/2 inch from the back of the cab (the small gap provides enough room for the lid to clear when opening). Moving the 190-pound system around definitely required a helping hand, and we should note that we positioned it slightly toward the passenger side of the truck to provide enough clearance to access the fuel nozzle easily. |  Next, we mounted the two-piece...  Next, we mounted the two-piece fuel nozzle bracket by using a 9/32-inch drill bit, then tightened up the provided nuts and bolts with a 7/16-inch socket. The bracket is easily adjustable for positioning the fuel nozzle any way you want. |
 Before we started mounting...  Before we started mounting the toolbox and refueling tank, we made sure the holes we planned to drill wouldn't hit anything under the truck. Then we marked our four mounting locations for the toolbox and refueling tank with a paint marker and drilled our holes with a 1/2-inch drill bit. |  After that, we drilled a 1-1/4-inch...  After that, we drilled a 1-1/4-inch hole, and to keep the lines from chafing, installed the provided rubber grommet for the wiring to pass through. Then, the second rubber grommet provided with the kit mounted in a pre-existing hole on the driver side of the bedside for the fuel tank breather hose to pass through. |  Then we marked and applied...  Then we marked and applied the four sticky-back foam strips to the bottom of the toolbox and refueling tank. We put two strips on each far end of the system, and the other two evenly spaced in the middle. We then re-positioned the toolbox 1/2 inch from the bed of the truck, being careful not to drag the foam strips along the bed (they can peel back off). |