Neutral safety switch harness question specific to 1974

yes sir, Brown did change to brown w/yellow at some point. More tracers are a good thing too since other browns are present. The brown ignition run and brown to windshield washer pump have been connected to wrong places, being in the same general area of engine bay.
And that white box with so many wires is the warning chime module. I don't know all circuits that went through there in every model.