Weber Carbs

Don't know what year,A friend has the small V6 in his Chevy Blazer.My buddy messed with several Holley carbs and never was satisfied. Swapped to the Weber and never looked back.And it wasn't a Weber AFB/Carter/Edelbrock look alike.Not sure of the model but it may be a 2bbl with a adapter. The engine has a aluminum 4 bbl intake.