There's also what I call "Frequency smoothing" meaning on most hot motors a smaller carb will be snappier and produce more vacuum across the board and unfortunately at max rpm's. By going to a bigger carb we smooth out the frequency's and like duration, it moves the power-band up accordingly and makes em easier to drive especially on the street and in a traction limited deal it helps a bunch cos I've been doing it w/great feedback from customers and my Dart loves the bigger carbs up to a point then the signal to the boosters is not happy therefore it draws more air than fuel and goes lean where a smaller carb can go rich up top because of the vacuum draw being greater(restriction).......