390 FE MECHANICAL FUEL PUMP

[1969_Mach1]

My other project, 1956 Ford F100 is getting closer to running and driving again after sitting since 1986.  Last few things are exhaust, radiator, and shifter assembly for the C6 trans.  After finishing the fuel system I am wondering if the stock fuel pump is sufficient.  So, I'm looking at mechanical fuel pumps for a 390.  The specs for stock pumps give a minimum flow rate of 25 GPH at 500 engine RPM.  Aftermarket performance pumps like Edelbrock or Holley only give a maximum flow rate spec.  So really, are they much better since you cannot get a direct comparison.


Before spending $160 and up for an aftermarket pump I have some questions.

1) Motor is mild and will make roughly 400 hp.  I know 25 GPH is too low for that, but that is an idle spec for the stock pump.  Will the stock pump flow much more at higher engine RPM?
2) Is there a stock pump that flows more than 25 gph?  If so what is the application?

Thanks, Mike