i been tuning my 235 in my 58 biscayne ,, i am real close , i am doing it by vacuum i have almost 20 on the gauge , i have the idle close to what i think and timing also , by the highest vacuum , but i still have a little popping in exhaust , just a little ,, whats the best way to adjust the carb , i have been screwing it in until it starts to mis and back it out a little ???
any input would be grateful
thanks
