In reading the answer to a previous question, it sounds like the included fuel pump runs at 90 psi. But the Edelbrock Pro-Flo 4 system requires 43-45 or 58-60 psi. Is the included fuel pump pressure adjustable, or, is there an option to order the M1A1 tank with a fuel pump that is compatible with the PF4 system to avoid using a fuel pressure regulator?