The sliding type fifth wheel hitches work great in a short bed truck, as long as the fifth wheel is equipped with a standard pinbox, If equipped with an extended pinbox like my toy hauler has, it virtually made my slider useless. Unless the combination was absolutely level or the trailer in an uphill position behind the truck, the extended pinbox would contact my tailgate and bed rails if turning.
I used the Dexter axle kit, to place the axles below the spring packs which netted me about 6 1/2" of clearance between trailer and bed rails, still not sufficient. So, if you are contemplating a slider for a shortbed application, and your trailer has an extended pinbox, I suggest you do a "mock up" if possible before spending the extra $s on a slider.
I had also purchased a "V notch" type tailgate, believing this would rectify my issue, only to be thwarted because I hadn't considered the bed rails while turning. So beware, all truck/trailer/hitch combinations present different challenges.
Jess
Note: some 5vr's with long overhang front bedrooms are not going to work well with a shortbed truck, no matter what you do.