A good O2 system can be a great help dialing in carbs. Especially pump gas big CFM carbs. like Dominator and 950+ CFM 4150 carbs. With enough work you can make them motors real tire spinners
I have the o2 on the dash but with sun glare is hard to see sometimes.The o2 helps a lot. ps here you can see the o2 is hard to see. Test launch a/f