I don't remember how much pressure that fuel pump makes but I would want the fuel regulator in line in front of the carb. and the second fuel filter to be 10 microns mounted between the regulator and carb.
I have used one of the Mallory 140 pumps with the regulator that Mallory sold with it and it was marginal on a smaller 440 bracket motor under 600 HP
Maybe a better, bigger pump is needed now instead of finding out later it isn't good enough