ive got the whole truck ('99 C2500 work truck) to remove everything from, computers and all. i'm wondering if anyone can shed some light onto fuel pump compatibility. i know a TBI pump doesnt make enough pressure for a vortec MPFI system. what i dont know, is if the vortec pumps/sending units would install into my suburban's fuel tank or if a vortec pump will work with a TBI sending unit. my old sending unit and pump were pretty much destroyed so they're gone. if i can get a new TBI sending unit and a new vortec pump and make them work happily together inside my suburban's tank that'd be great. so does anyone know more about this than i do?