Another thing we are guilty of many times is "tunnel vision". Which quite honestly is failing to see what other engine groups are doing to combat this issue. The Slant 6 guys battle and overcome this problem daily with there engines that range from 170, 198 and 225 cubic inches. By all accounts, even a 390 carb on most anything but the most radical firebreathing 225+ cubic inch Slant is too large for these engines. They most often use a 350 CFM 2 BBL. carb to handle their street driving and racing chores with no problems.
Its also a compound problem as well. The solution starts with the intake, and if the plenum is too large, this begins the spiraling downward of slow airspeed for the fuel charge. At this point many times, even if the right carb is chosen, the wrong intake often is overlooked as the true culprit in this situation. And then the carb gets the bad rap for being the problem. I guess the main thing is the lack of knowledge to make the right chooses for parts selection and understanding how they must be compatible and work together.
