I know this is a long shot - but this was a home birth and his mother did not register the birth.
We know, through his older brother, that he visited his paternal grandparents in 1987 or 1988.
Here is a link to my blog where I am trying to help him.
In Search Of My Family
We are not sure where he was born - but there is a recent photo of him and his mother. I am praying someone will recognize her.
