I run with a Ford 302, twin Facet Red Top Fuel pumps, Twin Filter King regulators feeding Holley 600 cfm 4 barrel 4160 carb. Have recently changed all the filters and cleaned components/lines where possible. On tick over,say 900 rpm, the pressure readings are 5.5 lbs on left pump and 6.5 lbs on right pump. Car is used for road use. Given this set up what would be the recommended fuel pressure setting? Many thanks.