Originally Posted By Cab_Burge
If both carbs. flow exactly as advertised, 1050 CFM,...

They don't, from the carb airflow tests I've seen. A 1.59 x 1.75 4150 vs a 4500 1.72 x 2.00... NOT apples to apples in airflow.

But the other question is whether the combination can USE the additional airflow of the 4500, especially if it isn't as responsive on the track. Only on way to know that for sure...