It’s gets a little confusing when I hear they are the same and sometimes hear that they are different.
I have seen an ad that states they are the same which makes sense if they were up until 1973.
Once I get it apart I can compare. Until I get it apart I was starting to research availability and have since had different responses.
I do appreciate the replies. I just have to confirm mine looking at the photos posted. If they are the same it would make it much easier to replace the core if needed.