need help with a Holley carb

I have a vacuum gauge and my son has a fuel pressure gauge. I replaced the gauge on the fuel line and checked the pressure and it was bouncing between 7-9 PSI. I ordered a Holley regulator. It will be here tomorrow. Get that on and regulate the pressure down to 6 PSI and then I am going to change the carb and put this 850 Quick Fuel on that my friend loaned me and see if that cures the problem. With the pressure bouncing back and forth it may be the fuel pump acting up. According to Holley tech support when I talked to the guy Sat. it looks like Lance hit the nail on the head according to him. Get this