No, well it depends on the inline pump that you use. Something like the T-Rex requires that the intank pump flow at least the same rate. T rex's flow i think 190lph, so youd need at least that for it work. I cant really speak for a stand alone pump, like an aeromotive though. Those work best with a sumped tank and would probably suck the 255 dry.
Drop the tank, spend 100 (if that) on a 255 intank and the $5 filler neck gasket and call it a day.