I hear a lot of people here saying "you" but all I can speak for is me.
I would not put that much trailer behind a half ton. I know there are many things I could do to help the truck do whatever job I asked it to do but if I had a choice I would get more truck or less trailer. I feel better using equipment that I don't have to run at 100% to do the job I am asking it to do. For what I need and what I hope to do soon my current truck will do the job I ask of it with room to spare.
Often "can my truck" really means "can I get away with..."
Good luck with your decision and be safe everyone...
I'm glad I went to 4.56 but I'm an oil burner. IMHO I think you'll be surprised at the benefit. I had a '97 ford with a 460 and 3.55 that struggled pulling so I put 4.30s in it. What a difference.
Do the math and figure out where your RPMs will be and the compromise between power and economy. Good Luck