If you have any problem, it will be with the tongue weight of the trailer overloading your truck's GVWR (Payload), hitch receiver rating (probably 1150# with WDH?) and/or rear GAWR (4050#?).
For some reason all my trailers have had over 15% of the trailer weight on the tongue when loaded, despite catalog ratios of only 12-13%. My current 7500# loaded trailer has about 1100# tongue weight and I'm right at the truck's weight limits even with a >2000# payload.
It tows fine, but I have to be careful loading the truck and trailer to stay at or under my limits. You may end up in the same place if the tongue weight of that Nash is upwards of 15%.