Loosing fuel pressure

You know what; my 400hp/367 doesn't even have a fuel pressure gauge.
Nor a quality oil-pressure gauge,
Nor a quality coolant temperature gauge.
All my car has is the factory slow gauges that are about as forthcoming as a pregnant wife.
Gauges are just tools. Build your systems with confidence, and you won't have to monitor them.
The carb doesn't actually care about fuel-pressure. It only cares about the liquid level in the bowl. As long as the bowl is full and stays full, everything is golden.