ummm, youll find only the gts/t's came in side feed, and the gtrs all came in top feed.
as far as i know the r33rb26 and the r32rb26 engines look exactly the same. and the all the sensors are in the exact same spots, the injectors also have the same resistor pack, which means the injectors are the same impedance.
i just dont know if the afms, knock sensors and oxygen sensors have the same paramaters, thus needing the ecu they were made for.
steve