I have a Pullrite, Lippert 1624 and a 6.5" bed (F150). I have no problems with the hitch clearing the tailgate and the bed rails when turning. I would hitch it up, go for a short pull around the storage lot and just have someone stand outside the truck and watch as you work through the turns. As long as you have 6 inches (I have 8) between the Fiver overhang and the top of the bed rails, you should be in good shape.
Current TV:'14 F350 Lariat CrewCab, 4x4 Short Bed SRW Diesel w/ Pullrite 2700 (16K)
Current Fiver: '15 Puma 295BHSS Anniversary Edition
Past TV: '13 F150 HD Payload SCrew EB, '08 Tundra CrewMax 5.7L, '02 'Burb 5.3L, '97 Dakota 3.9L
Past Trailers: '09 Wildwood LE 27RB, '02 Palomino Yearling RL, '87 Jayco 1006dlx