[Notanlines]

Mike, I have a few thought on your selection. Any of the 'big three' gas engines are going to absolutely pull their guts out hauling 28,000 pounds. Yes, I realize that all the diesels take up about 6-700 pounds of payload, but you will be desperate for the torque when the nut-cutting time comes.
What might I ask are you planning on putting in the rear of the toy hauler?
Where did you get the numbers for your truck, off the Ford website or off the door pillar sticker? If it is off the Ford site these numbers are probably bogus as a football bat. Truck manufacturers make things sound very rosy on their sites. The real world figures are always different.