I suggest after tuning with the wide band you remove it and install a common narrow band 3-4 wire heated type sensor and simple AFR gauge and use it as a general AFR monitor. (much like a temp or oil pressure idiot light. It will show up any afr
changes as you drive. Save the wide band and its expensive/delicate 02 sensor for actual tuning.
The fact that the narrow band type is not exactly 100% accurate at rich ratios/WOT is not critial once the car is correctly tuned. It will faithfully show you if the AFR tuning becomes difference eg weather condition change, vacuum leak failing fuel system, blocked jet, blown power valve etc etc. It will also show ignition faults etc.
As a rule they are much more bullet proof.
Why are you using leaded gas? Leaded gas is illegal on the street in all 50 states and all of Canada. All of the raceing fuel companies sell unleaded high octane racing gas. You do not need lead in the gas. The kids you save may be your own.
www.proracingfuels.com get the lead out....