Ok I know the Z31 uses a zirconia O2 sensor which from what I can tell is the 0-1V sensor. If that's the case does that mean that the S130 is a Titania sensor? If it's a Titania sensor does that mean that it's resistive? If it's resistive will it (a stock S130 ECU) work with a narrow band output from an LC1 wideband 02 system that puts out a 0-1V signal?

http://en.wikipedia.org/wiki/Oxygen_sensor

I'm assuming that the Titania uses a pull up to 1V resistor to get a reference voltage across the Titania narrow band sensor for a 1V output. If that's the case could you remove the pull up resistor from the ECU and use the simulated 1V narrow band signal from the ECU?