No matter what you do, remember a 50 year old truck with the stock suspension height has a high center of gravity,and was never designed to be driven at speeds over 50 mph. If stand on the brakes in a panic situation at 65 mph, most probably at least one or both rear wheels are prone to lock up and you go sideways and you may turn turtle in a NY minute.Aways drive a old truck with extreme awareness, just like riding a cycle in traffic.