Upgrade your classic 1959 Chevrolet Fullsize with our top-of-the-line Transmission Overdrive Harness. Designed for early production models, this one-piece harness provides a seamless connection to enhance your vehicle's performance, ensuring reliable overdrive function. Unlike alternative systems, our harness is engineered to meet the specific needs of your vintage ride, making installation straightforward and efficient. Enjoy the peace of mind knowing you've invested in a product that seamlessly integrates with your classic vehicle while boosting reliability and functionality.