i run consistant 3.17s in 200ft from tuning my carbs, for 1, i would go to a set of 38-39mm airstrykers, go to a size 52 on your pilot jet, and drill ur main jet out. set your timing to +7 degrees, and what i did on my 1st race was that i raised my needles all the way up, and if it was too fat, then id drop them, i kept dropping them until i got it lean but yet fat. and i usually run ngk spark plugs, i use a BR9ES, and if its not hot enough, go to a BR7ES.