1968 mustang wire harness | eBay Find great deals on eBay for 1968 mustang wire harness. Shop with confidence. Skip to main content. eBay Logo: Shop by category. Shop by category. Enter your search keyword 1967 1968 FORD MUSTANG ENGINE WIRING HARNESS BIG BLOCK # 67-22715 NEW. Brand New. $18. Buy It Now +$12 shipping. 1968 Mustang Wiring | CJ Pony Parts • Full Wiring Harnesses: If you’re performing a full replacement of your car’s wiring harness, take a look at the Classic Upgrade Kit from American Automotive. This kit is designed to replace your 1968 Mustang’s wiring harness using modern technology that delivers peace of mind with the vintage appearance you want.