They make tanks specifically for your truck mounted between the frame rails, under the bed. If your seat is stock, you really won’t gain any room because the seat frame hits the back cab wall stiffeners before it gets anyway near the gas tank.
Since you don’t have a seat riser, you could tilt the front of the seat bottom down to gain a bit of room, but that may feel strange.
Last edited by Phak1; 12/13/2025 9:13 PM. Reason: Typo
