Looking for a 1990 Nissan 300zx Twin Turbo 5 speed ECU. My car was originally an automatic but was converted to a manual transmission. The last piece of the puzzle is the ECU, which is original and intended for an automatic. I'm only interested in a reprogrammed ECU if the reprogramming is geared toward getting the most out of 94 octane fuel, refreshing related to technology changes since 1990. Not interested in ECUs that are reprogrammed for pure performance (larger injectors as an example).