So my electrical system is....well.......over 40 years old. The lights for the gauges do not work, the only light that does work is the little blue one that comes on when the brights are engaged and the dome light (sometimes) The blinkers act all weird and don't always work. The brake lights work when they want to and same for the head lights. I plan on starting the repairs to the old worn out system by getting an Optima red top (as the battery is relocated to the trunk and the Optima is sealed). The battery cut off works as it should and so do all the important electronics (elec. fuel pump, elec. fan, ignition etc) Any advice or tips as to what I can do to untangle this mess? Are the LED tail lights a good Idea? are they an easy install[IMG][/IMG]? Thanks!

 

Eeeeek, your fuse panel! I'm not the least bit surprised you have electrical gremlins.
I wonder how many of your circuits have poor to no power flowing through, due to all that rust and corrosion on the fuses and tabs.
Cleaning up the fuse panel and getting all the connections nice and shiny would be the first thing to do.
And then I'd start looking for a possible leak at the base of your windshield that's letting water in.

 

I will need to have the windshield replaced any way due to the crack iy has, so at least I can have it weatherproofed when I do that, anyone know what the small fuse at the bottom is for?

 

I believe the small fuse at the bottom was an accesory fuse that was originally left empty. It could be added and a wire plugged into it if used.
Sometimes if the wiring is bad enough it's better to start from new. If you look around and see the fuse block is bad, and the wiring has been chopped or hacked into, it's easier to just gut it all and start from zero.
With a new GM based aftermarket harness and block you could have everything wired new in a weekend, and then you will know there aren't any gremlins left. If you're looking to keep it all stock, then fixing the bad wiring with a new factory style harness would be another option.
LED tailights are easy, and work very well. They recently came out with a complete lense/lamp assembly, or you can retrofit new LED's to your existing sockets for '70-'73 Camaros. I've got a friend who sells United Pacific and has just started getting in the new retrofit lense/lamp items.
1970-1973 Chevrolet CAMARO LED TAIL LIGHTS 30 super bright LED's stop,tail,turn | eBay

 

The small fuse at the bottom is for the dash lights. I just changed mine a couple of weeks ago when I replaced the gauge face covers and put LED lights in the dash.

 

Thank you! that's exactly what isn't working right now......I will replace it anmd clean up the fuse block soon. I have a feeling that the water that was getting iun to rust everything was coming in from the hole left in the firewall by the absence of the wiper motor and the related mechanisms.....