[*13*]

As posted above, smaller runs better in every day driving. Larger cfm carbs really help at higher rpm's, where you are pulling enough air to need those big barrels. The lower rpm's & response suffer for it. I ran a 600cfm on a built 454 chebby(with big gears). That carb noticeably out performed the 750 & 800cfm carbs 99 percent of the time. The one or two times it really had the motor opened up, I needed more carb. So, you really need to decide where you want your power. Accurately sizing the carb will, obviously, give you decent drivability & performance.