The next big step is the wiring. The old stuff was a mess, so I didn't even try to use anything other than switches and stuff. I bought a wiring harness that was for pickups since it had longer wires for the rear lights. I opened the package and laid out the wiring and read through the installation manual several times to get my mind wrapped around it. I had to remove the radiator to do the wiring in the engine bay. I put all the wiring I could into the split braid wiring loom stuff.
I wanted to use the original ignition switch, so I disassembled it and attached new wires to it. I did this to several of the other switches, like the headlight and heater switches. The ones I could open up, I cleaned up the interior and contacts so they'd be reliable. I removed the wiring from the harness for anything I didn't need. (I'm wondering if that was a good idea or not now.) Examples are a reverse switch and light, tachometer wire, electric choke, neutral safety switch, radio and dome light switch and power.
I temporarily wired in some boat trailer taillights for the rear end. Some of the stuff I couldn't do at the time are the front lights - headlights, driving lights and parking lights.
I used heavy zip ties and heat shrink to make the connections tidy and reliable.