Then why was there an old Charger in Highland Park with a prototype six pack Hemi that had better acceleration than the stock dual quad Hemi intake???
A six pack will make more top end power than a 4 bbl if the engine is built to take advantage of the extra airflow.
Our six pack Superbird got better economy on the highway than our 79 Ford coachman conversion van with a 351 M engine in it. (cruising at 55-60 mph without using the secondaries). We shortly ditched the van for a Warlock II.