There is a variety of carbs and sizes of carbs that we run on our cruisers, each with varying degrees of success or failure, which has made me wonder how it works and begs the age-old question "does size matter?" Myself, I've got a Holley 500. Others run Holley 350's or Weber 380's, but most swear by the stock carb. As I recall, the stock carb is rated at 430 some CFM, which leads me to believe that the 2f draws 430 CFM. So in the case of the Holley 500, is the engine pulling that 430 CFM through it, or will the 2f draw 500cfm if the carb allows. Are the 350's and 380's starving the motor of the air it needs? The main reason I am asking is because I have wondered if I could restrict the 500 down to 430 and then jet down accordinigly, or is the motor just drawing all the air it needs?