One weber barrel for each intake port! means that there's no common plenum to cause reversion and rough cammy idle. idle will much smoother than similar holley setup.
GREAT 'WANG' NOISE! when they're working hard. all the euro supercars like ferrari and lambo used them.
downside is cost - complexity with the linkages and synchronising/tuning the carbs.
but you probably already knew this?
go for it!