I use an AEM inline wideband. You can replace the sensor with a Bosch o2 sensor from an auto part store once it starts going bad. No calibration needed.
4 wires
*12 volt feed hooked up to fuse block
*Ground
*Wire to PL Analog box port 1
*Ground
Off the ad: All AEM digital gauges feature a 0-5v analog output for use with data loggers and virtually any engine management system, such as the AEM EMS or FIC.