seems like this question has been coming up a few times lately. so i thought i would post some pictures of my setup.
first it come out of the fuel tank, to a facet fuel pump. i will up grade to the low pressure mallory when this one goes kaput.
then thru the tunnel to a professional products "low pressure" regulator. set at 2.5 psi for my weber IDF 40's.
then to my canton fuel filter with a one micron filter.
then the last stop is a pressure gauge right before it goes into the carburetors.
sense i have installed this system i have had 15k trouble free miles. not so much as a plugged idle jet. and with the proper jetting i am getting between 35 to 40 mpg consistently.