Sounds like you are starting to make your way through the car. I live in Columbus and have a '77 280Z that I bought from a guy a stone's throw from King's Island. The wiring, sensors and (especially) AFM on these cars are pretty much toast by this point. I replaced pretty much 100% of the wiring in the car including battery/alternator, fusible links, ECU/Engine, Dash, etc. A lot of it was waiting to fail TBH.
Anyways, shoot me a PM if you want contact info. I've been through a lot of stuff on the car and continue to do stuff. I have a Megasquirt in mine now and a turbo conversion that I am fabbing together. Anyways, it's always good to know other Datsun guys within a few hours, etc.