Yes but, the fuel pressure should vary with manifold vacuum. It should be less at idle, and increase at WOT, if that is not happening something is wrong. A pinched return hose is an example. A 1 psi change that you suggested raised a red flag.
His fuel rail does not have a vacuum actuated regulator. There is no return line on the later models.The pressure regulator is located in the fuel module inside the fuel tank.