6 pack carb numbers??

Hi,

I am new on this theme or stuff issues of six packs, so I also bought a (Remanufactured) six pack carbs from a seller in Ebay, but after of my click of "buy it know" and go back to compare the pictures of a new one I noticed that the ones that I bought are mechanical and the gas induction are on the driver side, so are differents, I received it today and are very nice ones, and the numbers that have are 4782 and 4783. Somebody told me that the AAR and TA 340 designated to race cars (SSCA) use this types of carbs, but I am not sure so now I have the sames doubts of NRUBINO, so I dont know if also I got ripped off.
The pic is from the carbs that I received this morning.

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