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.
Like the above post mentioned, I'd see what carb you have (Holley? Edelbrock?) and look at videos of how to rebuild it on youtube. Things that don't make sense, ask. In short, the vacuum from the engine pressurizes the carb from the top causing fuel to flow. The amount of fuel flowing is determined through jet size, amoung other things. But I think it's easier to learn about one carb than to try to learn of them all. Then, a lot of your knowledge will cross over to other carbs