1964-1973 Mustang Electrical & Wiring | CJ Pony Parts Like many classic Mustangs, your Mustang Electrical & Wiring components might be in pretty bad shape, or just underpowered for the components you have in your 1964-1973 Mustang. CJ Pony Parts has every wire or electrical component that you might need to fix existing trouble areas or upgrade the wiring to be able to handle more components.Distributor Lead Wiring · Wiring Kits · Gauge Feed Wiring · Electrical Hardware 65 mustang wiring harness | eBay Find great deals on eBay for 65 mustang wiring harness. Shop with confidence. Skip to main content. eBay Logo: Shop by category. Shop by category. Enter your search keyword 65 66 Mustang Engine Bay Headlight Wiring Harness Original 1965 1966. Pre-Owned. $50. Buy It Now +$29 shipping.