When replacing the gas tank, sending unit, fuel lines and fuel pump make sure you flush them out with some gas before hooking the system up to the carburetor. The gas tank, sending unit, and fuel lines are coated with oil to keep them from rusting while on the shelf. This oil will cause the plugs to fail and the carb to stop-up. I put some gas in the tank conected a hose to the fuel line (at the carb) and placed the hose in a gas can then turned the car over.