The GM platform will ride better onroad all things being equal, and quiet a bit so. It will also ride better on rough dirt roads forest roads etc. Its generally accepted that the straight axle on. The Ford is better for articulation in tough, technical stuff offroad. I’ve owned both and would...
Great looking rig. Who did the 4x4 conversion on it?
the 6.5 motors weren’t Duramax, they were pre the founding of the GM Isuzu partnership. It was either a GM in house or a Detroit Diesel, can’t remember.
Single contact patches in the rear allowing more pressure per is the best set up for on road snow and ice conditions. It’s a bit counter intuitive at first but spreading the weight out over multiples tires per actually allows to tires to slip more easily.