[jkd]

I don't know, Only Toyota For Me (screen name) already has a gooseneck hitch installed in his new Tundra and he says he has no problems pulling his horse trailer and travel trailer (like mine, his 5th wheel tvl tlr is converted from kingpin to gooseneck). He PM'ed that he *does* have to watch how sharply he jack-knifes his travel tlr though. Hopefully he'll add more to this thread.
Speaking of, B&W has now come out with a 4" ball extender just for all these short bed P.U.s that allow the hitch assembly to be installed at or forward of rear axle centerline for proper weight distribution, but yet the ball sits 4" further back to allow for better rear of cab clearance when jack-knifing a trailer.