WELCOME TO THE FORUM JenH. I have farmed, ranched and hauled livestock for 45 years. I have never seen an equalizer hitch on a bumper pull horse or livestock trailer. And those animals are in there shifting their weight
I believe the Oliver
has an extendable tongue which completely negates the need for a weight
distributing and/or anti-sway hitch. The lengthened tongue is the anti-sway device. It also has another feature, the water and waste tanks centered over the axle
so the balance does not change as their water levels change.
Equalizer and anti-sway devices on bumper pull trailers are to compensate for poor trailer design engineering or inadiquate tow vehicle size or setup.
Bill I would think twice before I traded the Duramax off. It will get much better fuel mileage towing than any gasoline engine vehicle will get towing the same trailer. You will have less fuel expense per mile with the Duramax. A gallon of gasoline and a gallon of diesel fuel are two different things. There is more energy in a gallon of diesel fuel. That is one reason it costs more per gallon.
You never see a heavy truck anymore that has a gasoline engine. Late model tractor trailer rigs weighing
80,000 LBs will get 7 MPG going down the road 70 MPH. That is the equivelent of a fiberglass trailer and tow vehicle rig weighing
10,000 LBs getting 56 MPG.
Running boards or side steps will help getting into or out of a tall truck. I carry one of the folding step stools from Camper World behind the passenger seat of my truck for when I transport my 85 year old mother who has difficulty getting in and out of vehicles.