Upgrade your classic ride with our 1959 Chevrolet Fullsize Overdrive Harness! Designed specifically for early production 6-cylinder models, this 1-piece wire harness simplifies your transmission system while enhancing performance and reliability. Say goodbye to messy connections and complex installations—our harness offers a straightforward solution that stands the test of time. Enjoy smoother gear shifts and improved functionality without compromising your vehicle's integrity.