Need carb tuning help - Video of wideband O2 + vacuum

If you are idling at a fuel air ratio of 12.6:1, then that is way too rich. You can adjust your carb primary idle adjustment screws and get that ratio up, but I am not sure if you can get it up to around the 13.7:1 area. You should confirm your carb jet sizes to start with. I will PM you with some better information on what I have done with my car.

The carb's jetting looks to be in the ball park.  As I am to lazy to write a missive, feel free to call me and I will talk you through how to dial in the carb with a wideband.  Missing in the video are throttle position and RPM.  713.553.5475

John

I think it is also important to know how much ethanol is in your fuel as that will affect the air fuel ratio that you are looking at, and perhaps it is better to look at lambda values instead, since they don't change depending on fuel type.

Thanks guys. Had an illuminating call with John which was very helpful.
At his suggestion I've ordered this book (hopefully the right edition):
https://www.amazon.com/Holley-...1557880522&psc=1

Just a friendly warning here. When you start playing around with a fuel air ratio gauge, then next step will take you to converting your car over to fuel injection! That is exactly the way it started with me.

Haha.
Yeah, it's occurred to me. If I'm honest, I'd rather tap a screen than pull off a float bowl.

The aftermarket fuel injection systems just keep getting better! With the on board monitors that they have, you can see everything that is going on with the system. Altitude changes are not an issue and cold starts are just smooth. I am feeding about 600 horsepower and can get 18 to 20 mph on the highway if I just drive the speed limit and don't get crazy. Just try a simple throttle body system to start with and you will get the idea.

I know this is now an old post but I thought I'd update how I resolved this in case someone has a similar issue in the future.
I went up to a size 40 squirter and adjusted the vacuum secondary speed screw almost all the way in/later. The lean peak was from too much air/not enough fuel when going toward WOT. These two things remedied it. Car is running great now. Thanks for all the help, as always.