Super Duty - Cargo Box Depth

I think Ford could benefit if the Super Duty Series of trucks had a Cargo Box Depth similar to the F-150.

This could create a more streamlined transition from cab to box with the rear windows having a more lower profile design.

Also, the extra enclosed area of the cargo box would be a welcome treat for all new and dedicated ford buyers.

Currently the depth of the Super Duty Series Cargo Boxes are pitifully un-proportioned to size and toughness of the trucks platform. F-150 buyers from the 2004 era re-design loved it… and my bet is so would Super Duty enthuses.
This will cause difficulty when pulling a fifth wheel trailer .Clearance with sides and trailer should be 6"minimun.Too tall side make that almost impossible with a level trailer.