If you're running a turbo (or S/C) then the Holley Blue will not work.
Unless of course you only want to make 3lbs. of boost.
Then it would work just fine.
The pump must be able to pump fuel at pressures that are 6psi greater than your boost pressure or you won't get any fuel into the carb.
This is assuming a blow-thru setup of course.
We're running a Aeromotive Tsunami EFI pump to feed Kelly's Falcon. It's using the same Mallory 4309 regulator with a 1/2" feed & return lines.
Works just fine for both street and strip.
This pump is a little extreme for the average Inline 6, but Carter, MSD, among others make an Inline EFI pump that'll work great!
Will