[patrickt]

Correct. You do not use the test light in series, but you could have it tapping off the hot side of Fuse #3 and the other lead of the light going straight to ground. That would be fine.

You are also correct that by removing the pink wire from the fuel sender and the wires from the charging light (and the 10 ohm shunt) that you have eliminated the fuel sender, charging light, and voltage regulator from the equation.

What's left is the wiper motor and switch, tachometer, fuel gauge, and heater and switch, along with the wiring and plugs that connect it all. You have a 10v Smiths voltage supply under there too. We won't forget that.