I disassembled, cleaned and reassembled my two Holley 1920 carburetors and took pictures along the way to help me put the pieces back together. If you haven't taken apart your carb and are curious what the insides look like, or took it apart and can't figure out where a certain part goes, I converted the pictures into a high-resolution video that you can view below. The carbs are the same with the exception that one of my trucks has a canister air filter and a governor, and the other truck has the circle air filter with no governor.
http://www.youtube.com/watch?v=wwpP8XwJs94
http://www.youtube.com/watch?v=C_4SYxeSrpI