Your 1974 Chevrolet deserves nothing less than the best when it comes to wiring, and our Engine Harness is the perfect upgrade for ensuring optimal performance. Designed specifically for the 350 and 400 cubic inch engines, this harness provides reliable electrical connections, enhancing efficiency and simplifying installations. Compared to standard options, our harness integrates seamlessly with H.E.I. systems and factory gauges, making it an essential component for restoring or improving your classic ride.