There are quite a few choices in the mass air meter market. We consulted Anderson Ford Motorsport's Rick Anderson about which one to use, given our engine combination and 38-lb/hr injectors. He recommended the Velocity meter from Professional Mass Air Systems. It's a state-of-the-art, 4-inch-diameter piece with a bell-shaped inlet to reduce signal noise and improve airflow, along with a new-style sampling element. It also offers more repeatable calibrations within OEM specifications. The Velocity meter retails for $403.