For two years many of the carb guys did a carb shootout at BLP.
if you ever wondered why I quote stuff from "Tuner" its because Mark Whitner showed that the basic principles work. Don't need to do all this real fancy stuff - in fact unless into a specific niche need - better off not.
There's only a few carbs that have been really new and different in the 4 barrel downdraft world. And maybe not eventhat different.
'Shrinker's Smart Carby" which is modular solid fuel carb was one - and that has to be set up for the specific motor combo. Predator of course. And then the Rochester Q-jet and Carter designs which have been revived a little bit.