Wow, that takes me back..I remodeled a plank house in '78, and it had even more wood. It had two layers of planking..don't know why! Maybe they ran two layers to compensate for warping? I kept expecting to find a hollow pocket..only to find that there was none!
But the wiring was easier because the receptacles were at the base of the baseboard. The switches were all located in voids behind molding at doorways. Sounds like you have a lot more work to do. I think the way to go is to route wire behind molding. I'll never forget the house we did 'cause it took two of us over two weeks to rewire that place..and I had been used to new wiring that takes only one or two days!
