I'm looking into building a custom gauge cluster for a project truck. The fuel level sending unit that I have will read 40 ohms when the fuel tank is empty, and 250 ohms when the fuel tank is full (it's just a potentiometer). Most aftermarket fuel gauges are designed to work with a sending unit that is 0 ohms when empty and 90 ohms when full. I am looking into designing a resistance converting/scaling circuit so that I can interface a standard aftermarket gauge to my factory fuel sending unit, but I am not sure where to start.
While researching, I came across the Negative Impedance Converter. Would it make sense to stack two "Negative Impedance Converter's" in series for my application?