Upgrade your classic GM vehicle's electrical system with our high-quality 1966 Chevrolet Engine Harness. Designed specifically for Chevelle, El Camino, Monte Carlo, and Malibu models, this harness features compatibility with factory gauges and A/C systems while being modified for use with a GM H.E.I. distributor. Elevate your vehicle's performance and reliability with a dependable, easy-to-install solution that beats outdated wiring options hands down.