fuel pump ?

[79c25]

So I have a problem that kinda has me stumped. I recently installed a Mr gasket electric fuel pump 4-7 psi 35 gph in my 79, and it seems like I either have a pin hole in my steel fuel line which is very possible as it is rusty, or the quadrajet carb requires more than 7 psi. Any suggestions would be greatly appreciated. The truck still runs barely but it runs and acts like its starving for fuel and when I shut it of the fuel filter (cheepo clear plastic unit) is dry again then I can bleed the air out and it will run fine til it empties the filter again.