Hello I am a dummy when it comes to carbs. I have a 66 Impala with a SB283 and a 2bbl carb. Is their a preset on the air and fuel adjustments on the carb? I need to get the carb back to basics and then i will try to fine tune. I have somehow gotten the carb out of wack along with the idle. I live in Illinois so if anyone could help me I would appreciate it.