I just finished installing the dual round top SU's into my 280z, carbs have been rebuilt and are running great. Last issue I'm having is the carbs are getting flooded after running for like 2 minutes. I had installed an electric "Mr. Gasket" universal fuel pump thats good for 4,6, and 8 cylinder cars and up to 7 pounds. I researched the forums for awhile but didn't really get any straight answers. Do I need to install a regulator? The fuel pump never stops, just keeps pumping. I'm getting the excess gas coming out through the needle, not through the return line at the carbs. My dad says a regulator shouldn't be needed, I found a couple of articles stating that a regulator is ALWAYS needed. The guy at Murrays says the only time I would get away without running a regulator is if the carbs can handle the pressure coming from the pump without flooding. I did my research and everything that was spoken about didn't really give me a straight answer, all help is appreciated!