Ronnie Ray,
In addition to Bill's good advice:
Two decisions/needs that you should consider:
1. Do you want original appearance wiring (braided coverings - more expensive) or modern-appearance wiring.
2. Do you want many more circuits because you are adding accessories.
Jim Carter sells both kinds of wiring harnesses designed for your year. Other very good general-purpose modern-style harnesses (with fuse box/boxes) are available, but you would have to install/run wires, cut wires, and terminate ends.
