What do I have here?

I would definitely hang onto it. 50+ years old, they are getting rarer and more desirable. I bought the equivalent for our 67 Commando 273.
Is this a carb worth saving? I don’t know much other than it’s a square bore Carter… Are these something desirable, or are they the Mopar equivalent of a Quadrajet off a Chevy 350?

This carb was on my 273 Charger engine. My thought was to replace it with an Edelbrock. Thanks!

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4120S Carburetor Info Page