filler neck modification

Very much agree with posts 77&78 pumps have way too much pressure. I have the problem with the 70 Dart and with my 04 Jeep I just use the lower pump catch on the gas handle and just enjoy the view. I missing something with the flap valve in the neck, please correct me if I am wrong. But in the early years of gas and cars (the leaded years) the gas nozzles were large. Unleaded gas and cars were now becoming the norm the gas pump nozzle smaller, made to fit into the flap valve in the neck of the tank. The larger leaded gas nozzle would not fit, thus you cannot use leaded gas in a unleaded car, defeating the emission laws for that year of vehicle.