I have a s/d pump and I just put a gauge on it the other day I have 1's and a decent tune just not worth a shat for daily driveing. I launched with 5 psi boost and did not lose any fuel pressure even in od and locked converter it is rock steady 65 psi.. I think I will put another one on when I get oil and the sticks get opened up alittle just for insurance . I need to rethink the 10 micron racor filter tho. Might cause a problem later.
P.S. I have #6 line from the pump to a Y then to the heads .I come out the front with stock return lines into an aeromotive A1000 regulator then return thru the stock lines to the tanks.