I have a 1960 DJ3A on an older frame (see my resto thread in projects section) of some unknown vintage. Where can I start to get a wiring diagram to understand what should be on the vehicle for electrical items/wiring and then where might I get a new wiring harness made up?

Jeep will have:
Headlights
Turn signals (separate up front and integral to brake lights in rear)
Gauges per factory
Brake lights
Horn
Maybe an interior dash light
Maybe heat
Would like a couple extra fuse positions for the future.

Thanks,

Ben