[JRTJH]

Something else to consider that I failed to mention is that a chassis/cab with a "rectangular utility bed" has square corners on the rear of the bed. On a pickup truck bed, the rear of the truck is "sculpted in" so the truck width under the fifth wheel nose is the same width as a SRW truck. With that utility bed, those square corners extend to the sides at the same width as the "dually fenders"... What that means is that "normal placement of a fifth wheel hitch over the rear axle" could pose a problem with truck bed clearance with the sloped front of the trailer (under the front overhang)...

You may find that you can't turn enough to maneuver the trailer into camping spaces or even make tight turns in a parking lot without the corner of the bed contacting the front of the trailer....

That can be overcome with a sliding hitch (extra expense, extra weight and extra mechanical maintenance)... But, don't "just look at the utility of the bed for other things" if the primary purpose of the truck is towing a fifth wheel, make sure it can do that job without having to "patch in more stuff so it can work"....

Truck bed clearance is a primary concern with any fifth wheel. If you can't turn the truck to navigate a parking lot without damaging the trailer, that type bed is a "NO GO" for towing.....