My 74 Scamp 440 sometimes when you turn the key doesn't do anything. I can sometimes move the floor shifter (auto console) and it will crank. Sometimes when it starts the fuel and temp gauge wont work. The other day it wouldn't do anything turning the key and the shifter deal didn't make a difference. I though all along maybe the neural switch was bad or needed adjusted. Anyhow I had no headlights or any anything. I though the battery wire was lose. it was a little but should have made enough contact to make something work. I jiggled the bunch of wires where it all goes into the fuse block and stuff started working. I turned the ignition switch on and a turn signal. I could move the wires around and make it stop working or start again. I am wondering what is the main power wire that feeds the whole thing. I did see a fusable link, is that the main power wire?