I installed the B&W turnoverball gooseneck hitch in my 2002, and it probably took 4-6 hours to install the hitch and the 7-pin connector in the bed. For my 2011, I farmed the installation out to a B&W dealer here in town, and he installed the new B&W gooseneck and the 7-pin connector in the bed in a little over half a day.
Rusty
Rusty