Note the Rochester B is manual choke, Rochester BC is autochoke. To avoid confusion I'd avoid using BC for other meanings when talking old Chevrolet. You should contact carbking if you want top quality guearanteed to work carburetors with the support of Jon Hardgrove who I believe is the worlds top expert on vintage carbs. His inventory and selection will blow your mind. Contact the expert and get advise you can trust:
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