Can someone please help me ID this Carter carb # c5l3 9636s.

I think the number range indicates it's an Edelbrock version?
9636S


9636S Carburetor Info Page
I thought ALL 9000 series carbs were aftermarket, even the ones sold way back in the era when the cars were new?? So someone likely bought it from an autoparts store and tossed the original on his car??