First off, whoever is telling you its the easiest, they are full of **** !!!
Not scaring you off though. It can be done, and it's not complicated. Biggest advice I'd give, is be sure to lay it out in a way you KNOW how the parts came out, and go back in the EXACT same way. I also suggest, take pics with a digital cam in every step that you pull more apart. This way if you fugg up and forget, or your parts layout gets kicked and now you don't know where **** goes, you can refer back to your pics. FYI, Holley is by far the easiest to rebuild. NO, I'm not suggesting getting a Holley. I don't care much for them but will run them. Qjet is the way to go for durability and dependability, Holley is the way to go for racing.
2 Things, Jim mentioned one already. The throttle shaft bushings !!! GET IT DONE or don't waste your time. If the carb has had them done before, then go for it, chances are they are still good bushings in the throttle shaft. This is a common problem on Qjets and usually why people don't rebuild them. The bushings and tool alone are about $60, so if a machine shop can do it for $35, get it done and chances are you're good to go for life. 2nd, the well plugs in the bottom of the carb need to be sealed using epoxy so they don't leak causing a poor idle and waste of fuel. Once you get those 2 items recitified, then you can put a kit in it and it'll be good as new, but not until then.