So I searched for my 1st cousins, once removed, and had success with the younger one. I found "Cousin Jim" quite quickly - though I didn't recognize him. I called mom over and she verified that the boy in the photo was her cousin. He's pictured as a sophomore in his class photo and again with his football team. (I also learned from my mom that my older cousin did not attend high school in Greenville, so I stopped looking for him there.)

(Wade Hampton High School Yearbook - 1976. Vol. 16, (Greenville, SC), Pg 216.)