check the source of your facts.It is just a flat 1/2'' steel plate that mounts to the crossmember. FYI this thing needs to go! The gas tank mods only apply to regular cab trucks.
this is what needs to be done on fuel tank for a supercab truck.
where you hang this monster is where the center support bearing is at. unless you fabricate another crossmember to support the Mitchell unit, you will need to mod the fuel tank.