I've got another one. I was wondering if there is any advantage to a returnless fuel rail on a 5.3? I think the easy thing to do would be to use the rail with the regulator that comes stock on a 5.3 and just use a return line, but what's the benefit to using the late model corvette filter with the internal regulator? If I were to do the corvette filter, would I use a rail from a corvette ls-1?