I have 8 greens on my 500 and runs Ok wouldn't really tell it was 8 injectors!! But for my black car although I have the 500 manifold I am going to run 4 bigger injectors on an L8 to bring it to present day tech! I have been told by many a person that with mapping now a massive injector can be controlled very easily on closed loop so I would say go the modern route!!
Nick