Proform 850 dialing it in closer

It's tough when you have a new tool to play with! laugh2-gif.gif
I agree with the mantra - Tune for Performance.
Lemme look how many times I've posted that recently...
Wideband UEGO Air/Fuel Sensor
Setup for 750DP on this 408
How to read carb calibration chart?

and this post too.
100 cfm more with anular and downleg boosters can't beat AFR

That said, IMO for Cudafever logging the AFR is useful to see the impact of changes.
I think it would be good to see if;
the AFR on primaries alone is about the same as when running on all four barrels.
the AFR at WOT and load could be made flatter.

Those are useful things to know when making decisions. For example, knowing the first will guide whether to change all four jets or just one pair.