Took the truck out fer a spin today to see if there were any rattles or squeeks. None so far!
I picked up some slotted angle and aluminum angle, nuts, bolts, lock washers, and hinges at Home Depot this afternoon. Seems I will have to drill out the hinge barrels with a 1/4" drill bit so the replacement bolt will fit. I will mount the hinges to some scrap 2x4 wood so I will have better leverage and control when drilling.
I will add at least two more rubber cords per side as insurance in case the current ones fail.