We have a 33' trailer that weighs 6,300 lbs. dry with a tongue weight of 750 lbs. We pull that with a 2013 F150 Supercrew that has the trailer tow package and the 6.2 litre V8 (sorry, I'm from Canada and I'd like to know the cubic inch equivalent as well)and according to Ford is rated to pull 11,500 lbs.
It pulls the trailer very nicely. It has plenty of power and usually my biggest problem is trying to keep my speed down to 60 mph. I do find that the gas mileage really suffers when I go over 60 but I had the same problem with trucks and trailers that we had previously.
As a rule I like to have at least 25% more towing capacity than I need.