Do a Google search for an exploded view of the carb you're working on, using the GM part number stamped on it as a reference. Since there's only around 200 variations of Q-Jet carbs over a 30-something year production run, you're bound to find a diagram eventually that matches what you've got. That way you can figure out what's missing.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!