I'm terrible on my car terms, whats this actually mean...
Vacuum Ported Fuel Pressure Regulator

That'* a good one. 2 possiblilites I'll guess at before JR jumps in here. #1, the pressure can vary depending on manifold pressure, or #2, the regulator is disabled and unable to deliver fuel if there isn't any vacuum present.....??

Sounds simple enough. The psi increased over the years in Bonnies I take it?

Yes, it did. With stricter emissions and the need for better performance, the injectors were changed to allow a higher fuel delivery pressure for fuel atomization.

Interesting....