*U.S., Social Security Death Index, 1935-2014
Name: Billy Blackstone
29611 Greenville, Greenville, South Carolina, USA
BORN: 26 May 1935
Last Benefit: 29611, Greenville, Greenville, South Carolina, United States of America
Died: Aug 1985
State (Year) SSN issued: South Carolina (Before 1951)
I realize this just points out what you have stated above.
However there seems to be no sure evidence that there is listed any information on find a grave is it possible that the body was Cremated?