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At what point is the Holley regulator that comes with their fuel pump a restriction to the flow to carburetor needle and seats? I have a Mallory Comp 250 fuel pump feeding into one of the Holley regulators.......is there a problem?

Which size Holley regulator? One of the early small ones or one of the newer larger ones?

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)