The good thing with the 2011 is that you already have the 8.8" rear end, and the 3.7L V6 has a little more power than the 4.0.
But most of the 3.7 cars were given a 2.73 rear end for gears so very slow getting started, but it improves the MPG. Get a tune from MPT which seems to have the best option for the 3.7, and maybe a 3.55 gear change in the rear end. I wouldn't go with anything more than 3.55 based upon the transmission - a 3.73 or 4.10 makes 1st gear pretty much useless and short shifts you.