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

It's not even in the book. (Galen white book) A 67 273 4 barrel would be a 4294, 4295,4304 or 4305 depending on whether it is manual or automatic trans or CAP or not. Your number sequence is miles off.
thanks much mine is a 4 speed so do you know which number should be on it? again many thanks