I should have stated in the first post, it is an F-250 Supercab, long bed, 6.4 diesel, 4X4. When fully loaded and the 5th wheel hooked up there is aprox. 1500# in the bed. That doesn't drop the rear of the truck enough to provide proper clearance unless I raise the pin height which then makes the trailer nose high. Since the rear of the truck is still several inches higher than the front, I was hoping there was an easy way to drop the height a couple inches.
As Hydro stated, I do have the option of raising the trailer. Since it has torsion axels, they can't be "flipped", but, a spacer can be installed below the frame to raise it. I was trying to avoid this since it is a lot of work, and it raises the center of gravity which decreases stability, reduces roof clearance, increases the hight of the first step and increases wind resistance which decreases mileage.