What is the specific problem? Potentially you will get more gas flow from the pressure line that way but not more pressure. What about larger fuel lines, filter, brass lines in the tank etc?
I have a tee in the pressure line of my mono,with about 3 inches of line that has a plug in it.My thought is it adds a buffer and helps keep the pressure stable,i cant prove any of this but its there and seems to help.......Mikey