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bbc, 502 w/ 10.5 to 1 comp., 600 lift cam, soon to be de-tuned to 1/4 lift cam. single plane high rise with dual feed Holley 850cm.
question is mechanical replacement pump or switch to electric with regulator.
 

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I have an electric fuel pump installed in my car and run a mechanical one for daily driving. The electric fuel pump only gets turned on at the drag strip or to prime the fuel lines when the car's been sitting for a long time.

What kind of use do you expect out of your car? I would still run a mechanical fuel pump since I've personally seen electric fuel pumps fail. Holleys like around 5-6 pounds of fuel pressure so I would run a regulator anyway.
 
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