does your tank [not] hang low?

[1-ton of fun]

who has found a tank that fits between the rails of a 55-59 and doesn't hang down?

i have a long bed, so there is a lot of available length. i was thinking of a muscle car tank that has a rear fill, and mounting it turned 90 degrees so the filler is pointing behind the drivers side wheel. mount it almost up against the bed cross sills, trying to keep the hang down below the frame to a minimum.

does anyone have anything that hangs down less than 2" than the frame?