[BIG BLOCK JIMMY]

gmachinz,
Hello and happy new year. I'm attempting to research electrical upgrades for my 72 Jimmy. I have ordered a large box of goodies from MAD enterprises.
I can rewire an entire house, but the vehicle stuff has me moderately lost. Do you have any experience with his kits? I THINK my biggest question is my Jimmy doesn't appear to have the "bus" bar. Someone put some nice LOUD horns on it, but everything is spiced in?