Saddle Truck Box and clearance with a Fifth Wheel

Mount that box on a 96" bed and you will have 5 ft 8 inches left, almost a foot shorter than a short bed. Probably not going to make it work with an Andersen hitch. Even if you set your hitch up with clearance over the tool box the trailer front end will dip when backing and hit the box. Better off to use a bed rail high box like pictured above.