I have a set of hollys 6 BBL sitting on 440, They have all recently been done,plated rebuilt etc,etc, I hooked a vacum gauge to the center carb port the one going to the distributor, ( the higher port of the 2 ) I am showing 5 in of vacum @ 825 rpm. Is this normal I have been told there should be none or almost nothing, If wrong what is problem ?

Thanks guys