divorced choke for 1977 regal 350 engine

I am trying to rebuild a 1977 regal 240.  The choke is missing from the carburetor and it looks like it should be a "divorced choke" model.  I cannot find any serial numbers on the engine, making it much more difficult.  I took pictures of the intake manifold and noticed two bolts that are about 2 1/4 inches apart that "may" accommodate a choke.  Meanwhile the correct choke linkage is still there which may help in identifying the correct choke.  I have pictures showing the engine valve covers as 350.... looking for any suggestions. I can't attach pictures as the website is limiting the attachment files.  If you can help, email me at bbuchanan62@gmail.com and I will send the pictures that I wish I could attach here!  Thanks!!!!