Got the 5.3 engine and trans in my 84 Monte Carlo ss. Wondering what everyone else is using in their fuel systems? I see Holley has a sending unit, pump, and built in Regulator #12-306 $329.95. I also see people using another sending unit for an efi car and a corvette fuel filter. I have an 87 ls monte carlo v6 but I can't remember what the sending unit looks like. Also see Aeromotive has a fuel tank and pump.