Towing capacity

My truck has a rear axle ratio of 3.54, and a GCWR of 14,500 lbs. With me, a truck box, some stuff, and no 5th wheel hitch, my truck weighs in at 6,100 lbs, meaning I can haul a loaded trailer of about 8000 lbs. So, I'm looking a 5th wheel with a dry weight of perhaps 6000 lbs. Yay, progress!