Fuel pressure

Friends,

I'm running a holley 150gph fuel pump on my blown 177 Landy B&M 440 68 roadrunner. The pump came with a cheap holley regulator that didnt have a return style regulator. So I bought a procomp billet one that was supposed to be return style,but wasnt. I dont want the pump dead heading. What I did was make a jet with a .095 hole as the return thru a 3/8 line to the tank. I went and tested it, at idle it was 6.5 psi and was pretty flat thru 1st and 2nd gear,started to fall to 5.5 psi in 3rd and in 4th dropped to 4.5 psi. Do guys think this enough pressure at the big end being supercharged? Also is this setup similar to you guys that are running a return line? I could make another jet with a .050 hole and up the volume and pressure to the carbs? Any thoughts would be appreciated!
Thanks-Gary

Your pressure #'s sound adequate & the fact that it was flat in 1st & 2nd(w well over 5.5psi) tells me the problem is elsewhere. EDIT I reread your post & did you mean the eng response was flat or the psi decline was flat(as in not dropping much)? Your #'s are good.

Thanks Robert,

No its not the performance only the pressure. The car pulls very hard all the way. Just want to make sure I dont run into a lean condition.

Thanks again-Gary