1965 273 Charger Carter Carb

Try to rebuild it. I found a used 600 Edelbrock for $100 at a swap meet to get me running. My original carb was not good. The 600 is still in there. Starts every time, runs great and gets damn near 20 mpg. Electric choke is a plus. Just sayin.
This Carter is model 3853 S, records showing correct that I can find for this engine and 4 speed manual trans. What's the difference between a manual and automatic carb and are the Edelbrocks made to distinguish also? Were you able to use the chrome air cleaner on your Eddie?