67 mustang wiring harness | eBay Find great deals on eBay for 67 mustang wiring harness. Shop with confidence. Skip to main content. eBay Logo: Shop by category. Shop by category. Enter your search keyword 67 Ford Mustang v8 Engine Gauge Feed Wiring Harness 289 302 with tach (Fits: 1967 Mustang) Brand New. $29. Buy It 1967 Mustang Wiring Harness | eBay Part # 20121. Painless Wiring. This 22 circuit direct fit 1967-1968 Mustang harness has many of the factory connectors already installed on the harness out of the box.