Quadrajet fuel pressure?

I need to put a new electric fuel pump on my ride. I have a 327 Chevy with a 4bbl Quadrajet. There are two fuel pumps I can choose from, one is 1-4 PSI, and the other is 4-7 PSI. Which one would work best?

 

The 'Carter #P4070 fuel pump.

#1 HAMB Electric Pump..... period.

 

On a street engine 3 to 4 psi is plenty for a Q-jet carb.

 

2 to 6max with 4 to 6 being optimal.

 

Thanks guys.