New trailers, especially this one, are tall. The trailer is sitting in my shop all leveled and if I walk into the ball mount it will hit me in the groin. They are really really tall. Getting out of the trailer takes a three step folding staircase and then a fourth full step before you hit the ground. This is a brand new 2012 Outdoor RV trailer made in Oregon by the same company that makes Artic Fox trailers and Nash. My last trailer was a nash and was much lower. Overall height is still under 12' but ground clearance is excellent.
The F350 has been lowered to F250 height by changing the blocks under the leaf springs. All springs and overloads are still F350 OEM. This dropped the hitch just over 2". The trailer's full tongue weight drops the rear bumper 3" and then when I set the WDH the bumper regains one of those inches for a total drop of 2" and just barely touching the overloads. It actually rides very nicely and level as set up. That crazy shank was 100$!
So the problem, Reg, is that the trailer ball mount is tall. Truck is fine. Trailer has max GVWR of 8200 so we're not talking a huge trailer. In fact, many folks report towing this size of trailer with half ton trucks.
