Are you sure he didn't just tell you to ignore the ratings stamped on the bumper next to where the ball attaches? That wouldn't be an incorrect statement since you are going to need to have a weight distribution hitch installed and those ratings will be vastly different than what is stamped on that bumper. Almost any full sized pickup equipped with a proper weight distribution hitch is going to be rated to handle both your tongue weight and the weight of your trailer. In 1/2 ton models, you will be getting close to the max ratings. Only you can make the decision as to whether or not going up to a 3/4 ton or larger truck is going to be worth the money and sacrifice of ride comfort and fuel economy.