dual carb/ tri-power carb adapter

Anyone have any info. / experience on dual carb/ tri-power carb adapters for 4 bbl. intakes? Specifically for small block Chevy.
Want to know drivability & performance issues.

 

You mean an adapter to install mulitple carbs on an existing 4bbl manifold? Seems to me it's always better to use a dedicated multiple carb intake manifold from what I hear.

 

Yeah. Vintage Speed sells them. Seems to me that fuel distribution would be a concern.

 

A giant step backward.