WTF is this???

AVS stands for Air Valve Secondary, the spring-loaded air-valve is up top and unmistakable
AFB stands for Aluminum Four Barrel. No spring-loaded air valve
TQ stands for BFH, Big Freaking Howler. Up top air valve again, but black center body. Best dang 4bbl carb Chrysler ever built.And when it begins to moan, you know something big is about to happen