Dummys guide to carburated engines

Please excuse my ignorance. My old man isn't much of a mechanic and I came up in a time without carburetor's. Can somebody point in the right direction so I can read up and talk intelligently about the subject? I have a 1970 Duster and I am trying to figure out this engine and the components that allow it to run. Before I add EFI I need to learn about carburetor's. How they work and how to adjust them. Its only right to understand what I have before I move on or upgrade. I want to know what is under the hood and what it does. There is so much space If you can point me to a book, video or a guide for the Mopar small block engines, I would appreciate it.