Longbed tailgate will hit camper when hitching

I had the same issue with my b&w patriot hitch and 2013 f250 longbed It turns out all i had to do was take the head of the hitch off pull the pins out take the hitch off the rails , turn it around 180 degrees on the rails put the pins back in , put the head back on , swap the spring that levels the head to the new location and now i have about 4" of clearance from tailgate to trailer when hitching up. In other words I guess i had it on back to front