Gas gauge goes UP when I press the pedal???

There is a 5 volt regulator attached the back of the fuel gauge. It supplies the power to all of the gauges. The OEM version has points and can act up. That combined with a grounding problem can make strange things happen like this. It's easy to check the grounds under the hood first. The engine can rock under throttle and pull on a grounding strap. Put a volt meter on the power wire going through the fire wall connector and try revving the motor. Cleaning up all of the ground connections is a first step.