Here is another suggestion. If you're in upstate NY or central NY or any rural area where you'd have access to a hardware store go to a True Value or Ace and find one of those boxes of various metal pieces. Buy a length of the smallest piano wire they have...probably about 1mm diameter or so. You can run this carefully through vacuum passages and even passages you think are clean may have junk in there. Especially if this carburetor sat in some shed or junkyard for a long time, it is likely small insects made their way inside and if they did, there could be who knows what in there.
