Tim from Oregon

Hello all, I am in the process of restoring a 1973 Charger that I found has a 1976-78 mopar 400. This question applies to A bodies as well as B. I got this car as a basket case and after studying the VIN number and the engine block casting numbers I found that someone has replaced the engine with a 1976-78 400.
My questions is what was the correct carburetor for this year of engine. I think from what I a found is that Chrysler stopped using the 2 bbl for these years. Is this correct?

Thanks in advance for your input,
Tim
Welcome !