Holley 2bbl list/ series numbers

[Rustyrodknocker]

Im looking for cross reference information for 12R4761B carburetors. I have the holley list number page open and I have not been able to find the series or family of carbs that would share parts. 4761 does not show on the list.

I have googled several list numbers but have not found anything that looks like these carburators. Which I believe to be the 500cfm oem part in 69. I don't have one available currently but my next guess was to pull out all of my 2bbl carbs and compare list numbers.