Just incase you guys don’t know.... the wire that the factory O2 sensor plugs into that is part of the starter wiring harness runs up with the battery cables and there is another plug by the pass side fender. You could hook your Spartan controller into that plug and just run the O2 sensor down to the exhaust.
Edit: here are some pictures.
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Dang! Nice to know! Thanks! I just ordered my kit so I'm doing more researching! Great threads!