You can probably pull it with no problem, provided your not living in the mountains and you're not pulling it for 2000 miles. I would have no problem with the engine or truck, but I would be concerned about a light duty transmission pulling this kind of load on a long haul.
Make sure you have a trailer tow package with a tranny cooler and keep an eye on the transmission temperature.
I guess what I'm getting at is it seems as if many refer to the "light duty transmission" in the eco as the concern with towing over what's recommended by the factory. It just seems odd if the tranny behind the hemi and eco is the same and the hemi properly equipped can go into the mid 10k range why it would be a problem with the eco. Don't get me wrong, if I had something that heavy and was towing frequently then in my opinion there would be nothing less that a 3/4 ton in my shop.
Truck has enough torque and won't be shifting very often on tow mode.You can rev a Deizel and it just loves it. Unlike the gasoline engines. The tranny will stay cool. Also just revving a 6 cylinder and the boost adjust itself to the amount of fuel given. Nice now just make with a manual tranny.