I won't do anything to the sensor as it is really the same as the upstream unit except for wire length but it will trip the CE light for you. I might put you into limp mode too where your truck runs like shit. You can get direct fit cats from Summit for about a $100. Jegs probably has them too.
They have units that are a direct fit bolt in deal. You're in AR so will not have any trouble. Only us poor bastids in the PRC have any trouble. We have to drive to NV to get ours. That's because our state bureaucrats out here are taking such good care of us and have our best interest at heart. I do hope you detect the note of sarcasm.