Quick question; I have a 1978 chevy P/U with a 454 BBC and was wondering if I have my fuel system set up correctly. I have a (three line fuel sending unit) in my fuel tank. One line is a supply line, the second is a vent line, the third line is a fuel return line. I have the fuel supply line from the tank going to the fuel pump, the vent line vents at the gas tank sending unit, and the fuel return line goes from my regulator back to the tank. My regulator is located after the fuel pump and before the carburetor. The fuel regulator has two outlets, one going to the carb and the other is going back to the gas tank as a fuel return line. Do I have this system setup correctly? When the truck is at idle the fuel pressure gage flutters. The gage is located just before the carburetor. Thank You......DET45