Carb tuning, accelerator pumps.

I keep trying to make gains on my car, it's never perfect, right.
The next step I want to improve is my car's reaction when the gas is mashed. There is a little bit of lag right now, I want to get rid of it. It's killing my reaction time.
So the question: How do you set up your Acc pump cam and linkage? Mine has a bit of play from the pump arm to the spring bolt on the linkage. what do you guys set the gap at?
Also, not sure what to try to change the cam and position of cam to improve. Any suggestions? This is a ProForm 750 Holley.