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The carb with the glass bowl is a Holley 1904 and it would be the correct carb for a 223 I-block 6 cyl.
If you do rebuild this carb, do NOT use the fuel inlet fitting and needle provided in the rebuild kit. If you DO use the rebuild parts, you will need to add a fuel pressure regulator ahead of the carb. And you will replace the fuel pressure regulator every 12 months because they will fail within that time frame.