ive seen first hand that liquid filled gages are a bad idea because the heat of under the hood can distort gage cause of the liquid in them.
also ive done reserch and found magna fuel is the only company who makes regulators that can fully control line pressures exceeding 24 lbs.i called all the major players when i set up my fuel system and i would do it no other way than to use their top line regulators.i even dead head regulators with my superflow pump(original name of magna fuel they said this pump is good up to 2000 or 2500 hp i cant remember...)
good luck always do as much reserch you can before you invest one cent for making fewest mistakes possible!!! good luck