Found this when I installed the hood stack. My assumption is that it has been like that for a good while. My boost went from 40 to 55 after I fixed it. Since the truck only hit 35psi on dunbars I wonder how much this affected it.
a good bit probly, i swapped pumps on mine and left one of the lower intake bolts laying and then found it when washing the motor and it made a hell of a difference