[MarkoPolo]

Point well taken Mr. P. I did not directly answer the OP's question. I thought he might appreciate a comparison of 1/2 ton gas vs. 3/4 ton diesel. For what it's worth, I read that a fair number of Eco-boost owners pull 5th wheel trailers. I presume it is over the recommended weight limits and not something I would do. Also, thanks for the insight about sliding fifth wheel hitch. But, you sure are right that a diesel is the way to go if a 5th wheel is for certain in your future.