Upgrade your classic Chevrolet with our Wire Harness Modification Kit for H.E.I. (High Energy Ignition) conversion, designed specifically for 1972 to 1974 Truck, Pick-Up, Suburban, and Blazer models. This kit offers a reliable and efficient way to enhance your ignition system, ensuring consistent performance, improved fuel efficiency, and easier starting. Experience a noticeable boost in your engine’s reliability compared to traditional ignition systems—making it a must-have for vintage truck enthusiasts.