The Updraft Carburetor kits, that are available on the market,are very incomplete. The large chain parts stores don't carry them. I got a kit, from a company out of florida, & I can't remember where the other one came from, but I was very disappointed in them. The Original Carter Repair Kits, are what you want. They show up on ebay, from time, to time. Here's a NOS Carter 2075S, on ebay now,
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&Item=120203831727 Also check out the parts For Sale section here,. Chevyb, had some NOS Updraft Carb. floats available.