Hey guys i have an 03 gt making 520hp....currently i have stock rails and lines with 55 high imp injectors and cobra pumps with a kenne bell bap...the car drives like crap and runs really rich....i want to go with a return style fuel system but im unsure what i need....can i keep my pumps?do i buy a sumped tank or do i have to sump mine? does any1 sell a kit? any info would be awseome...p.s. i also have steeda rails that i havent used