I know none of the above products will increase the load capacity when hauling large loads in the rear of a 1 ton truck. What product do you think works the best in handling heavy loads. For example my 1 ton truck can haul approx. 3500lbs in the bed. Yes there are times when I am overloaded and carry almost 4500lbs. What product do you think would work best for helping level out the load? I know running overloaded is not safe, but it's normally only for a few miles at a time.