Slant 6 Turbo 68Dart Project

I have one filter directly before the pump. I have another wix inline filter I can put in if it'd do anything. Would there really be enough of a pressure increase in the bowl to force fuel back out of the needle and seat though? and I think I see what you're getting at with the filter, maybe it would keep the fuel from flowing back to the regulator if I add one after the reg?