The year is 1974, early '75 at the very latest. I was listening to the Wake Forest University student radio station (this is in North Carolina, USA) very late at night and a song was played that contained the line

"we traded riffs like we'd known each other for years"

As far as musical style... It could be called Folk Rock, Country Rock, Blue Rock, Blues Folk Country Rock, etc. Those of you who were around then know how "styles" just emerged almost effortlessly with one another. Anyhow, I've been hunting this for decades, so any help would be greatly appreciated.