Like others are saying, you will want at least the MaxTow option with the 3.73 rear end. The HD Payload option would add more payload and increase the rear GAWR so would be even better.
Last time I weighed my trailer it was 7500# but had over 15% tongue weight. I was 20# under the hitch receiver rating of 1150#, 200# under the truck's GVWR (7500#), but 130# over the rear GAWR (4050#). By tightening up the WDH and moving some stuff around, I believe we're now under all ratings, but haven't weighed to be sure.
So, depending upon the trailer's loaded tongue weight you could well will be close to the truck ratings or over.
With this much load, I found the suspension too soft and upgraded it and added LT tires. The ride now is acceptable. With the HD payload option, these mods are already done for you. If I had known about it I would probably have ordered a truck with the HD Payload option.
