jdm asasin

hey im about to buy a cobra intake manifold and bbk throtale body and injectors i already have a msd in my car how much of a power gain should this add im not exactly sure of what size injectors becuase the motor is being turned into a 347 stroker and adventualy boost

im planing on putting a desecent size wet shot in it does anyone know how much the manifold will handle