Fuel sending units read WRONG time after time!

Try to use a brass, and not a plastic float, they are less prone to chemicals in the fuel these days. Also, many of the repro fuel sending unit resistor wires do not have the same number of turns of wire in them as the stock ones. I've noticed some of the Spectrum units have huge gaps between the strands of wires. I'd also do the upgrade to the solid state voltage limiter described on the allpar site. I did one for an E body and it works well, no issues with the fuel gauge reading. I managed to encase everything inside the case of a gutted factory voltage limiter so it plugs in just like a stock unit.