I wouldn't do it.
It's just too heavy...plain and simple.
I pull about 7,200 pounds with 1,200 lbs on pin weight (cargo weight)
Yes the truck has the power and a very good tranny....but you will more than likely over your gross axle weight rating. (GAWR)
It won't be a comfortable experience.
If you are commited to getting this new rig then go get the appropriate truck to pull it. you will not be sorry you did.
BTW...I am looking at 3/4 and 1 ton trucks myself.
Love the Tundra. 70,000 miles trouble free.
Best gas mileage so far towing was 10 mpg. I average about 9 mpg.
You have done the right thing by coming here and asking.
You now have to decide if you are going to listen to the advice given.
Have fun.
Bill
