Yea.....The worst part is over. Getting the carb's off! Not much fun reinstalling them either......

Buy an "Ultrasonic" washer.....and let everything soak in that for several hours, without the heat feature on (MAY cause other problems?). You should not need any new parts, unless a gasket or some other part is ruined?
Disassemble as far as you can, for the best results. Since you can only do one or two carb's at a time, keep track of all the parts for each.
Just be sure, NOT to use a solution that will harm aluminum in the washer. It will turn black. I like "Simple Green" or "Jungle Jake". They are Aluminum "safe".......as per the "Air Force"........for Plane parts.
The Washers work well, and pay for themselves in no time. Especially if you like to rebuild stuff on a regular basis.