'99 7.3L and an '04 Cummins 555.
I did tow the camp trailer this weekend (100 miles) and tinkered with the truck a little. Towed up with a stock tune and towed back with an Edge "tow" tune. Couldn't stand the stock tune and changed it out at the Pilot in Ogden. It's not my '99 7.3L and definitely not my Cummins, but for what I paid, the truck should work out fine.
Thing is a tank even with a trailer on. Handled the load well.
It does NOT have an intercooler. Must have this truck confused with something else I looked at. Not sure if we'll tow the camp trailer to OSRC with the truck, the Navigator or to just drive the JK and stay at the Diamond D motel in Delta. Still working that out.