I'm looking to replace the fuel sending unit and fuel tank on my '74 GTO. We dropped the tank to check to the condition and the tank is rusted more than I'd like and the sending unit is almost completed seized up from rust. A replacement fuel tank is an easy and quick find. However, I'm having a terrible time finding a replacement sending unit. It looks like it's a discontinued part and there's not much guidance on comparable parts. Any help out there would be appreciated.