O2 Sensor on a Carb Engine Question

I run dual quads on my 505. I use a vacuum gauge, AFR gauge, AND read my plugs to initially tune, change tune for different parts of the country (elevation), and try to maximize my WOT throttle tuning at the track. All of it are just tools at my disposal. I also log all of my time slips into a spreadsheet along with any changes i made. For me, this iterative process is part of the fun of my hobby.

I'm not really into putting around to car shows and donut get togethers - so you have to figure out what you like to do with these machines.