Thanks for the replies. Robert, the main feed hasn't gone out. I'm off work on an injury, so I have time to kill. I was gonna go over the wire harness and fix any loose connections, and replace the main feed, since it looks shady to me. I plan on replacing that wire, along with the one for the ammeter (which I'm not sure I will use), and clean and/or replace any terminals that need it. The only addition I was gonna have was a graphic equalizer/amp, which is very small. The car will have no A/C, no power brakes, nor power steering. Manual windows and locks, as well. It's a 4-speed, too.

Any tips or suggestions???