What do I need for a proper under-dash rewire?

I'm thinking of a rewire under dash on 67 cuda not looking fwd to it. No way around pulling the dash really. Console and ac just to add to the challenge. Windshield has to come out for dash removal. Snowballs quickly into a **** show lol.
I'll be following along here
The wiring harness will come out without pulling the entire dash.
If you'll separate the bulkhead connectors outside and shove that box into the cabin, drop the light switch and the wiper switch at bezel nuts, same with flasher modules, bring those out still connected, 1 screw in the fuse box, connectors behind the left kick panel, Pull the instrument panel, get the harnesses branches out from under the very few straps...
Yeah there's a brake lamp switch connector, reverse lamp connector, blower switch connector, and another at blower resistor pack, glove box lamp, wire to right door jamb switch.
If you think that reads like a LOT, remember its nothing compared to later models.