Basically, if one does not have the tag number on the Rochester B, one has a door-stop.
Not that I’m advocating Rochester B carbs but some of the carb bases are stamped with the model as was mine.
Phil Moderator, The Engine Shop, Interiors and Project Journals
1952 Chevrolet 3100, Three on the Tree, 4:11 torque tube Updated to: ‘59 235 w/hydraulic lifters, 12v w/alternator, HEI, PCV and Power front Disc Brakes Project Journals Stovebolt Gallery Forum