Upgrade your classic Chevrolet Fullsize with our high-quality engine harness specifically designed for 1974 models equipped with 350 and 400 cubic inch engines and T.H. 400 automatic transmissions. This durable wiring solution ensures optimal performance, reliability, and compatibility with your vehicle's electrical system. Unlike generic alternatives, our harness is engineered for seamless installation and long-lasting operation, allowing you to restore or enhance your classic ride with confidence.