Generally, standard mechanical pumps put out 3 to 5 lbs. Webers are very sensitive to excessive pressure, lots of flooding problems, so you might need an adjustable pressure regulator. Check JEGS, or one of the hotrod mail-order distributors for a pressure regulator. I think Holley makes a good one that's adjustable. Fuel pressure/vacuum gauges are available at just about any parts store, and it's a necessary item in any tuner's tool box.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
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