The Fish is a fixed-venturii carb- it's claim to fame is better airflow due to a lack of a fuel-metering venturii above the throttle plate, and supposedly superior atomization via shearing a thin fuel film off the edge of the butterfly. The flowbench should tell if the airflow is sufficient to support 6 or 8 cyl engines. A wet-flow bench would give insight into atomiziation, as would a laser spray anlysis unit (real expensive equipment). Chrysler's CFI unit was meant to generate 10-50 micron size particles (1 micron is about the dia of a human hair). 10 micron particles are small enough to stay suspended in the intake manifold & not get slung out in the bends. Ideally, you want all particles in the intake charge to be identical in size for a rapid, even burn. Most carbs generate an irregular mix from 10- 400 micron dia particles. Fuel Injection system particles have better size distribution, but still typically average 100 microns in dia.
