Welcome to the forum where everyone has a opinion. Heres mine.
Its a new engine and I doubt anyone has any towing experience with it yet.
Looking at the '14 Ram Body Builders spec web shows the 2500 4wd 6.4 Hemi 3.73 has a 12xxx lb tow rating . Or 15xxx lb tow rating with 4.10 gears.
The truck has a 10000 lb GVWR and 6500 RAWR depending truck configuration according to the builders guide.
You won't find a GCWR placarded anywhere on the truck as its not a fed requirement. Just GVWR/FAWR/RAWR on the certification placard.
The weight your looking at will make a good combo for the 2500 6.4 Hemi with the 3.73 or thye 4.10 gears.