Likely you will not be happy (at least not as happy as you could be) with that combo. Many tow at or above their ratings, but why start out that way...?
Does the truck have "P metric" or LT tires? P metric will give you a nicer ride, but will make towing experience less than desirable at times with the sidewall flex they have.
Does the truck have transmission cooler (more than the in radiator one)? I would assume it does, but is it big enough to keep the transmission operational.
Do you have a scale to check your tongue weight? I have a Sherline that comes in real handy when I am loading (or changing how I load). I like to have an idea of the tongue weight, which can vary several hundred pounds by loading different...