Classic Update Kit - 1957 Chevy Passenger We Make Wiring COMPLETE WIRING KIT - 1957 Chevy, Classic Update Series Instrument Cluster wiring is designed with a "cluster harness disconnect" system for easy service and assembly. All original terminals, connectors, and light sockets are also supplied for original cluster gauges. Rear body harness assembly is designed to plug into the main harness 1957 chevy belair wiring harness | eBay Find great deals on eBay for 1957 chevy belair wiring harness. Shop with confidence. Skip to main content. eBay Logo: Shop by category. 1957 Chevrolet Belair 210 150 Under Dash Wiring Harness Standard No Heater Radio (Fits: 1957 Chevrolet) Brand New. $184. FAST 'N FREE. Buy It Now.