Fuel pressure gauge or fuel level gauge? I figure fuel level since you said yours "went" already, and that's the only fuel gauge that's stock. (Just making sure)
I installed an Autometer fuel level guage in my '92. You will need the #4315 gauge if your car is an '89 or before; you will need the #4318 gauge if you have a '90 or later. No need to change any sending units. The gauge comes with instructions on how to hookup. Pretty easy installation. Good luck.