I picked up a free Cagle fuel regulator and have a few questions about it. It has a fuel inlet, fuel outlet, and fuel pressure gage outlet; it also has a fitting on the bottom. Is this fitting for a vacuum line? If so what do you connect it to? Also can you run an electric fuel pump with this regulator? If you can what pressure pump should you use, what is the normal operating fuel pressure for a '78 Jeep with the 258 inline six? Another question, how do you lean out the carb on this Jeep? Is there a jet kit or something to do this. My Jeep runs way too rich as is. Thanks in advance for any help.