pay attention to detail, take pics if you have to (digital cameras are awesome) and set the parts down in the order you take them off so it goes back together in reverse.
compressed air with a rubber nozzled blower is invaluable for this job.. blow out passages real well.. as for cleaning, my favorite solution is a tin baking pan or tupperware filled with lacquer thinner.. and a toothbrush or other small brush..
try not to destroy the gaskets so you can compare old with new and use the right one (there will be extras)...... watch for ball bearings in various places, and like I said, keep a watchful eye for detail (does that make sense?? heh) .. after its all said and done I think you'll find that its really fairly simple and rewarding... doug roe has a great book on quadrajets if you wanna spend 25 bucks..
good luck ---
mike