You can drive all you want, just don't floor it. My experience is that the tail pipe sniffer the dyno shops use are accurate. Maybe a 1/10th difference from the wideband. So get on a dyno and you'll have the answer. I like having the wideband. I confirmed the accuracy of the dyno sniffer and after having it for a while know how the AFR's act at part throttle, under cold and hot conditions. Knowing what's normal is comforting. Modding can be heart stopping. Be calm, patient, and do what needs to be done. I'm happy now but was tramatized in the beginning too.

Les