Thanks for the reply gentlemen!

The carburetor does have a 1-1/16 cast into the side of it! That was a full on lesson on Holley carbs and that’s exactly the type of learning I am here for and my reason for being here. I am hoping the carb rebuild kit I ordered will fit it. It says AA1 on the box…

Thanks for the input! I like not only knowing the difference, but also why!