A gradual evolution from bluegrass to rock with:

Bill Clifton "Where the Rainbow Finds It's End"

Dian & the Greenbriar Boys (same name album)

Seldom Scene "The New Seldom Scene Album"

Commander Cody "Sleazy Roadside Stories"

Jerry Garcia "Live at Keen College"

Bill Kirchen "Hammer of the Honky-Tonk Gods"

    (plus his "Hot Rod Lincoln" off the Twang Bangers album -
    it's better than the one on "Hot Rod Lincoln Live!", which is hard to believe)