The copy of a SS application will give you the applicant's birth date, etc and parents names and I believe the mother's maiden surname.
I found a Clovis NM marriage lookup site but no Clyde/Felman/Stafford came up.
I also went to the Government Registry Online Records Retrieval. The name of Clyde Stafford , previous address of Albuquerque,NM. But it's one of those pay to view sites. You may want to check it out. Here is the link to the online records retrieval. Gloria