Another 1920 question

I am hesitant to post this, especially being my first post here. But I have been looking for almost two weeks now trying to identify the carburetor on my 73' dart. I have read about every thread on here pertaining to 1920's but I still haven’t been able to find any reference that shows what I need.

The story I got from the last owner was that he had changed the carb from the carter to the holley, the issue I have now is that I don’t know what the holley is off of. It is in desperate need of a rebuild and I want to make sure I get the right rebuild kit and float.

As I said it is a model 1920

Above the float bowl there are two stamped numbers:

7031
0899

they are stamped exactly as typed, one over the other, no letters or other numbers. The surface is clean and there are no other marks. The other number below the fuel inlet is:

12R5592B

I believe that is the holley list number.

As I said, I would greatly appreciate the help in identification. Thanks