I am working on my first classic a 66 Fury III. The original fuse panel had some corrosion so I got the bright idea to replace it with a modern style fuse box the has a main power feed to the fuses and a main ground feed to the ground terminals. I am having trouble figuring out what wire I would use for the main power. I have a wiring diagram but I am just not getting it. I am trying to get the wiring done so I can put the dash back in. I appreciate any knowledge that you are willing to give.