the stock pump is more like 9-13 psi and putting a regulator inline with it now will kill the pump due to excessive back pressure. There are 2 ways to deal with it - 1 is to go electric or 2 is to use a regulator. However, there are 2 ways to run a regulator - inline or in a t configuration. If you put a t in the line to the carb, then put the reg off the center of the t and install a 2nd t in the fuel tank return line, it will bleed off the excess fuel pressure without backpressuring the pump and also won't act as a restriction to fuel flow at WOT. its the same as a fancy reg with bleed off without the price