ok gusy i just switched from my 305 tbi to a 350 with a carb on it and i used the mallory 3-port regulator to get the fuel pressure down. well can set it at 6 and drive around and then i'll look at the guage under the hood and it will say sumtin like 11 or 2 or 0 but the car still runs. now do u think my regulator is bad or shoudl i try a new guage first? thanks guys

 

if it runs good i wouldn't worry about it. i'd suspect the gauge first then the regulator