Forwarding this fax from George: The fuel pressure regulator was never a dealer item. This stems from the time when a 2 bbl carb engine had the fuel pump replaced later in the car's life. What happened was that many times a fuel pump of higher pressure was installed and the carb would flood because of too much pressure. J.C. Whitney had those regulators for sale as did many auto parts stores. When they failed, either the car would not run or the carb. would flood. Many non-dealer garages would suggest to the car owner to install one of these things to make a few more bucks because they could not correct the problem. Or the owner just thought it was a "neat" thing to install hoping for better fuel mileage (?). George