Hey guys...like I said in my earlier post, the OP is wanting a 350 DRW truck, capable of heavy loads. This will have a huge RAWR, and a payload rating much higher than a SRW. When ordering this truck, with a gas engine, you want the most drive train tow capacity, or you are defeating the purpose of the truck. The OP is looking at a 15K GVWR trailer, does not own it. He may decide on a bigger one. It would not make sense to put a 15K hitch in it either, due to not matching the truck's capability. On a new 250, with 10-speed, it would not matter as much, which gear set.
Jerry