I got to say, I agree with Dennis On this - it was my immediate thought when I read it. Hooking up a fuel pressure gage when you need it is not a  big dealBe safe.John

"Yep that what we want. Lets add two more things to fail. A low cost fuel
pressure gauge when it breaks will be a really fire starter. As for a
coolant pressure gauge yep good confirmation of a leak once the steaming
starts."