Ken
From what I,ve read you want to point the injector at the intake valve. If you put port dividers in that wouldn't be a problem, but you would have extend the dividers out of the port enough to get past the injectors. The port injection injection isn't exactly a precise injection like a diesel. Therefore you almost have to have the ports divided to keep the mixture right.
From what I've read and experienced on these things it gets worse if you have much overlap in the cam. Probably the best bet on the Chevys is to use a throttle body setup, but then you get back into the management problem. Well everyone said Stovebolts were easy.
Dennis