Where is all the wiring & How do I make my engine bay look like this?

You can see the temp sending unit wire and the alternator wires coming up the passenger side valve cover. The wiper motor wires are there as well along with the coil wires behind the carb. No battery, so it is probably in the trunk, and the starter solenoid is probably with it or on the inside of the firewall. That leaves the wires for the lights and the horn relay, which are probably routed under the inner fenders.
Very clean job. Moving the battery makes all the difference.