In case you missed it in my Alternator post:
Folks, I've got to tell you I'm thoroughly impressed by my '70-'73 Camaro wiring harness from American Autowire. This thing is so complete it even has the washer circuit for the wipers. I'm going to have to add the Add Coolant circuit, which will require one wire through the firewall to the computer that isn't in the harness. Also, I may add the seat belt circuit with the warning light only when the driver's belt is not buckled (no timer or buzzer). There are built-in extras for the electric fuel pump and for ECM power as well as optional dash set-up depending on whether or not you have aftermarket or stock gauges. A very basic knowledge of auto wiring and soldering skills will help the novice.
If you ever have to re-wire your h-body I've got to tell you BUY THIS KIT!!! It's got everything you will need and more!
Best,
Dave