I am running the mallory 140 filter before there 140 pump and have had 0 problems so far idle pressure is 8-9 lbs and never seen it lower than 7.5 at end of run this is a return style system.

70 duster full chassis super pro 416 CNC Indybrock heads 727 w/brake

best so far 1.212 60 6.219 in 1/8 at 110.88 9.768 at 137.81 1/4