Suedeplymouth I ran my 97's with a regulator that ran no more than 2 1/2 PSI since both the 94 and 97 were meant to run at that. A flattie stock fuel pump will put out 3 3/4 psi so It wasn't the regulator that made them leak. The trouble I had with them is that the float would have to be adjusted to 1/4-5/16 or the carbs would leak gas. I didn't obviously blow the seals on any of my carbs!