Street Demon Feeder

[magwakeenercew2jh]

A few years ago, when playing around with the intake, I changed over to a Street Demon 625 CFM on the 350.
I know they've had mixed (pun) reviews. But, since I got it all synched and metered out, I'm happy with it for now.

During that remake of the fuel system (tank to carb. Tank still in the cab on purpose), I added an electric fuel
pump that I'm running along the frame under the tank.

I thought the pump was rated for up to about 12 lbs psi. Demon calls for 5-6 at idle.
I'm using a decent fuel pressure "gate" with adjustments from about 3-20 psi.

The gage on the pressure regulator won't read more than about 3.5 psi all the way open. The truck runs great.
Except it starves under prolonged revs... or running up a grade when the trans kicks down (and revs increase) .

So, the question is, what electric fuel pump are any of you folks running that will feed my Demon properly?

Thanks.