Fuel Gauge

What you seeing is how all the aftermarket fuel senders work. You can pay big bucks for an oem rebuild, or get a Meter Match. Cruiser just did a meter match on his car. I loaned him a calibration box I made. Lots of threads on this. If you decide to do a meter match let me know if you need help.

if you still have your oem sender keep it. Those are hard to come by for rebuilding.