I think those are just casting numbers. The actual model of the carb would be stamped into the bottom if they existed. I would suggest following Wrenchbenders advice and buy the universal kit.

Here is a link from Keith Hardy’s website that has allot of info specifically for Rochester type “B” carburetors, including rebuilding. [LINK]


Phil
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1952 Chevrolet 3100, Three on the Tree, 4:11 torque tube
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