I have the exact same truck pulling an Eagle (now Elk) Ridge 35 DSRL (similar size & weight) and I see no reason you can't pull that. I don't feel uncomfortable at all with my set up. Would it be better with a Dually? I'm sure it would. But your GVWR should be fine if you aren't loaded to the max.
That all being said, your pin weight is significantly higher than mine is. They are assuming you will be hauling a load in the back of yours, which in turn takes weight off the front. Running empty is going to sag your truck.
If you decide to go with this set up, I would suggest getting some air springs to help keep the truck level.