redneck is telling it like it is.

weigh it or you will never know!

6ply tires towing 3 head sounds like a disaster waiting to happen. a light trailer has about 1000lb on the truck with no tack or horses in,add animals, horse crap and tack and you will have over 2500 on the truck without counting wt of the truck or payload or passingers or whatever. check the tires, just cause the engine gets it up to the top dont mean it is safe. running on the edge of the wt. rateing bothers me to no end. the same thing with the tires on the trailer. lots of trailers come with 6 ply and if you weigh them they are way over what the tires should have on them.
that little 5.3 gas will do fine if you only use it twice a year. durability is important to me.