Upgrade your classic Chevrolet with the GM 1966-1968 Fullsize Classic Update Series Wiring Harness System, designed to modernize your vehicle’s electrical system while preserving its vintage charm. This wiring harness offers unparalleled flexibility, allowing you to customize the routing to meet your specific needs, ensuring compatibility with the most popular aftermarket and reproduction accessories. Say goodbye to outdated wiring and hello to a reliable, efficient electrical system!