I'm fitting a P.I. intake onto a Cougar with a 4.6, and the fuel system is a return style. The rail from the old intake won't fit on the new P.I. intake, and the old rail from my car is returnless. What years did the 'Stang come with a return style rail, and would that work just the same on this engine? If I can't find a rail that would work, would just blocking off the return line work, or using a T-fitting to make them one line? I doubt that would work, but I figured I'd ask. Thanks.