I have a 2013 Ram Sport 1500 4x4 with the 5.7L. hemi engine with a 3.92 rear end. I am considering buying a 2012 Rockwood Signature Ultra Lite 5th wheel. The dry weight of the trailer is 6399lbs. and the hitch weight is 1515lbs. I want to make sure that my truck can comfortably handle the trailer before I buy. I'm not concerned about the dry weight of the trailer, but I'm not sure about the hitch weight. Any advice out there? I have the 5'7" box on my truck. I'm assuming I can buy a hitch that will work. Thanks.