I replaced the old electric fuel pump the previous owner installed with a Carter Fuel pump. Seeing the Manuel says 4-5psi from pump to carb I figured the Carter 4psi should be fine.. this is whats happening: Car starts and purrs..i drive about town, stop and go traffic good power over all, etc.. but after a while it was begin to sputter, as if it was starving for fuel? I've gotten to the point where if i apply the gas pedal, it bogs completely. I basically have to keep my foot off the gas and let it idle home at 20mph. THEN, if i sit and wait a bit, it'll then run fine again until it begins the sputtering again. Thinking maybe this 4psi pump may not be enough for my 264? Thought the manual calls for 4 - 5 psi i figured it would suffice. I will be doing a fuel pressure test, but i just wanted to see if anyone had some insight on this? Thanks in advance.