There was a really excellent show on rebuilding a Q-Jet on Speed TV last Saturday. I don't remember which show but I believe it was either "Hot Rod TV" or "American Muscle Car."
They took a really grungy, spider infested carb, and showed, step by step, how to clean and rebuild it, including epoxying the bottom of the float bowl, adjusting butterflys, installing throttle shaft bushings, adjusting float level and re-jetting.
I'm not sure if this show is available on DVD but they are usually repeated so it would be worthwhile watching for a rerun and taping it if possible.