Sandra, you certainly may. I love it that the journey of the ballad is taking shape.
As a note: Emelyn Elizabeth Gardner, whose text from Michigan you refer to, was a very significant collector of folklore in rural New York state before she moved to Michigan. Her 1937 volume 'Folklore from the Scoharie Hills' is one of the major collections from this region.
I just checked the book. Alas, though not geographically or culturally far from Ezra Barhight, she makes no mention of Johnny Troy.