Adding info like cam specs and compression ratio is helpful information. While the engine like and engine is a collection of parts the whole is a system where all these parts function in a concert.

My knee-jerk from the AFR is tye mixture is going in the wrong direction when you blip the throttle, it should go toward more fuel in tye AFR not less. Whether that is a quirky reading from the sensor and gauge or whether the carb is falling lean is another dimension to problem solving. Assuming the instrumentation is truthful the carb need to be putting in more fuel. This might be not enough accelerating pump or the power valve doesn't switch on of the main jets are too lean though given the AFR before you whacked the throttle I have that eventuality pretty low on my problem list.

The first places I’d go is accelerating pump stroke and or the power valve.

Bogie

 

Sorry I updated the post👍

 

Isnt the 3310 a 750 CFM 4150?

what is the squirter size, accelerator pump size, and gap on the accelerator cam to lever arm?

 

I think you're right
It say 3310-9 on it
I set the pump arm after spec but could be checked.
Will check the cam and get back

 

Squirter size 25 and the cam are a white one in th #1 position
The gap looks ok when checked

 

I would go up a bit on the squirter to at least 28

 

Got it!

I ordered a bigger and will try and see👍

 

Update

I put in a squirter size 29 an got really good crisp response when I light blip the throttle.
Much better than before.
When I blip it a bit harder the AFR still goes up to 15-20
Should I try changing the squirter cam?

 

I would probably go with a #30 squirter and look at one of the other cams.

which one are you running now?

 

White one in first hole

 

I would probably try the green one