Keystone, Awesome truck. You will enjoy the heck out of it. I had the exact same truck except it was a short bed. If it had been 4x4, I would still be driving it, but I've never been good at seeing the future, and life changes, so I wound up swapping mine in for a 2016.
Do you know what the rear axle ratio is? My 2011 had the 3.31, but the new truck has the 3.55. Interesting thing is that the 2011 had more 'snap' to it than the new one does. Maybe being 4x2, there were fewer moving parts. That truck would actually accelerate pulling 12000 lbs going up a 7% grade. I was always amazed at the pep it had.
Don't get me wrong, this F350 will naturally haul butt, but my impression was that the older truck was quicker.
2016 Ford F-350 Lariat CC, 4x4 SRW. B&W turnover with extender. 2015 CC Silverback 29RE, fitted with Reese Goose Box. Amateur Extra Class K5TS, 2016 nights camped 16