School me on wiring

Lot's of good and great suggestions posted all of them have merit.

If you have a fear or truly do not understand it then I would advise hiring someone that does, and preferably some one willing to show and teach you. I prefer working with a good clean factory harness. Simple mods you may desire can be relatively easy to perform. Installing a complete aftermarket wiring system can be very daunting!

Don't forget many of the these cars are over or approaching 50 years of service and multiple owners modification and time in service sometimes warrants complete replacement with reproduction originals or full aftermarket kits!