Is this true about fuel pumps?

[SlowStang2]

I read in another post on here that no matter what fuel pump you get, the motor will take as much fuel as it needs and any left over goes back in the tank. Is this true? Basically, if you wanted, you could get a 190 pump and it wouldn't affect gas mileage at all if your car is lightly modified? Someone tell me please. Oh well, what is the stock pump ranged at? For a 94 GT that is..

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94' Stang GT Convertible Cobra upper&lower, Mac cold air w/K&N, BBK equal length shorties, BBK offroad H-pipe, American Thunder cat-back, BBK T/B 65mm, 24lb injectors, Pro-77mm MAM, pulleys, aluminum driveshaft, 3.55s 14.4@100. (Sad, i know. i have stock heads)