My TT is the same size and weight and it's a load for my 3500. Not because of pulling power but because it's so big and heavy. I also have the benefit of LT tires and a much heavier suspension but I have still had to upgrade my hitch and put a lot of tension on the bars. The difference between not enough and the right amount of tension can be a very small adjustment but make a huge difference.
Regardless of what the manufacturer claims, that is a huge load for a 1/2T.
If yo spring for an entire new hitch, go for the Dual Cam. I've had both and it works far better than the Equalizer and friction bars because it doesn't just restrict movement, it actually PUSHES the trailer back in line.