recommended fuel pressure for a Holley?
 

have a Holley HP 4150 on there, 950.

has a gauge, been running about 5.

moved the regulator around (moved fuel lines from wheel well area, that won't pass NHRA tech, i was told)

and noticed it was about 7 or 8 now, guess i nudged it.

does it really matter at all?

Of course it matters! That's your tune up! That is like saying that you accidently bumped your timing up to 60 degrees and asking if it matters.
(Not trying to be a smartass)

Your carburetor requires 4 to 7 psi of fuel supply at all times, under all conditions.

http://www.bob2000.com/carb.htm

I'm not reading all that.

4 pounds of fuel pressure and 7 pounds of fuel pressure are completely different tuneups.

If your car was tuned up on 5 pounds of pressure, and you now have 7-8, it is a different tune up, there is no doubt about it.

And actually, 5 pounds and 5 1/2 pounds are a substantially different tuneup. If your car has never had a precise tuneup to begin with, then it probably doesn't matter, but that is a whole different issue.