FYI. I have been involved in cases such as I described. Not my person but my company and we received no help from the manufacturer that designed a less than adequate product and I have been known to load way passed the max but slowed down so that things like brakes were not over stressed. My 75 Duster /6 pulled a Winnebago trailer at least 2 thousand miles and never had brake issues. But I descended in lower gears and kept brakes cool.