I have a bit more aggresive setup than you and I run a 190lph Walbro fuel pump...they are roughly $90 bucks and you can get them from either www.jdsperformance.com or www.50resto.com
It will easily give you enough fuel for your current combo...
I even think the 155lph would be enough...assuming you actually have the 155lph...
Get a 255, any unused fuel will go back to the tank, good to have a strong pump anyways cause you might get wild with mods down the road. all these pumps are made by walbro......BBK, holley, granitelli.
This is the one item that bigger is better. I would stay with the normal 255lph just because on a street car your running the pump longer on your drives and if you go under 1/2 tank of fuel your not getting the pump cooled with the fuel in the tank and they don't last long because of over heating. Walbro has posted this warning a couple of years ago because the HP255 was not lasting in street applications. The HP255 also pulls 5amps more and on the old tech sheet I have it also required 13.2 volts to be running at fuel pressure.