Attempted to start, nothing, no power anywhere. Full charge on battery. Found + cable to starter half-fried. Replaced cable with insulation wrap this time. Car will not start, no click, no nothing. No power to anything else. While the new + cable has a small wire, this car never had a wire connected to it.

Dejavu..

Check out the thread about my 69. Almost the same issue.

The people here said I needed a wire from my battery to the horn relay. I found a terminal block between my headlights on the driver's side. I connected the loose wire from the battery to a piece of fuseable link and to the terminal. It solved my problem. Good luck.

edited to add link..
http://www.chevelles.com/forums/showthread.php?t=277620

The stater solenoid needs to be power up by keyed power......this means you dont have power at the key if the starter doesnt at least click.
I would check out the link in fclouds replie.:thumbsup:

The battery + cable small wire needs to be connected for the ignition key to work. The battery small cable should have a 14g fusible link attached, then run to the terminal on the radiator core support. From there a 10g wire goes to the horn relay, then to the fuse box inside the car. With this circuit connected the ignition key should engage the starter solenoid.