My tow vehicle is Ram 3500 Dually and I tow a Arctic Fox 35-5. I can't remember my pin weight but I do recall it is under my max, fully loaded fifth wheel. I installed air bags to solve my problem of the ram sagging rear end. Not sure if any of he information I shared help the OP. I just know with the combination of the MorRyde pin box and fully articulating hitch, I have no problem with chucking.
Happy Camping everyone