Help Me Calibrate My Fuel Gauge

I don't ask questions until I've searched FABO, Moparts and even YouTube. I check out FABO multiple times a day. I've seen threads that discuss how inaccurate repop fuel sending units are, but I haven't come across a thread that gives a step-by-step how to wire up a power source, fuel gauge, and fuel sending unit on an A-body Rallye dash.
Perhaps I missed one, but I've been looking at this topic for some time.