One thing to never forget - the wiring in your muscle car is forty years old and updating to modern and safe components is easy. These Painless Wiring harnesses feature many pre-wired connections and are color coded to make installation a snap. Instructions included.
This 25 circuit harness was designed to fit the following 1969-1974 GM muscle cars: Camaro/Firebird, Nova, El Camino, Monte Carlo, Apollo, Chevelle, Cutlass, Skylark, Tempest, and GTO. This harness features a pre-wired factory style bulkhead connector that plugs directly into the back of the fuse block in the factory location. Factory original quick connect terminals are included for the in dash printed circuit board. Pre-terminated plugs for a column mounted ignition switch, dimmer switch, headlights & headlight switch, blower motor, wiper motor, and turn signal switch. Included with this harness you'll also find a detailed manual and each wire is custom printed with the circuit identification as well as using GM color codes for easy installation.
1969-1974 GM Muscle Car Wiring Instructions (PDF)