Carb king.
www.thecarburetorshop.com He is in the Lake of the Ozarks area.
They are not that hard to work on. What are the symptoms? They don't like too much fuel pressure. 4-5 lbs. tops.
I do carb work for people in the K.C. area but I have no way of testing them so I don't do them for out of town people.