one thing I haven't seen mentioned is to watch how far that center of gravity is in front of your rear wheels, the more it is closer to the front the greater percentage of weight that is transferred to the front tires. I end up blocking mine back about 3" from the front of my box to keep the COG about 2.5 to 3.5" ahead of my rear axel. I don't suspect I have a short box model as its a 10' but I do suspect the newer ford boxes are longer than the older ones and even shifted back the amount I do there is only 1/2" between my tail lights and the trailer overhang.
Steve
