Hello wacha,
I too have McCune ancestors from Ballygowan, and Kilmood and Ravara too.
James M McCune born 19 July 1871 in Kilmood lived in Ballygowan. He married a Mary Boyd? 1899. James and Mary moved to Pittsburgh, PA in 1907 with their 3 sons, Robert, James and Samuel.
I believe that James was the son of Robert McCune who died 29 June 1900. Robert McCune was married to Ann McCormick on 1 September 1866 in Saintfield, Down.
And I believe Robert McCune was the son of William McCune who died 18 April 1860.
I found a William McCune and James McCune to be on the Tithe Applotment List for Ravara, Killinchy, Down in 1833. And there is a Samuel McCune who is on the Freeholders List for 1776 in Ravara.
I am sure there is some sort of connection between our McCune's. If any of this sounds familiar feel free to share any information.