Side drafts

You're almost always going to be better off with a single appropriately-chosen, well-tuned carburetor than with two or more carbs, unless the primary main objective is to make people go "Whoah, cool" when you open the hood. Everything is more of a hassle with multiple carbs. Carburetor matching, tuning, and synchronisation, throttle linkage, choke linkage, kickdown linkage, air cleaners, etc.