4479s was a replacement carburetor. Excellent carburetors, but the replacements used different parts than Carter's O.E. units. Even repair kits for the replacements are pricey.

I don't see anything missing in the picture; what part do you need?

Jon.

Good carburetion is fuelish hot air
The most expensive carburetor is the wrong one you attempt to modify.
If you truly believe "one size fits all," try walking a mile in your spouse's shoes!
The Carburetor Shop