This is a stonker. These are the original raw recordings for GT & the D's first album of 1977, before the overdubbed bass of new band member Billy Blough. Not that the GT sound was ever refined: there is always, from my admittedly limited exploration, an authentic edge, the blues electrified but real.
Two tracks here illustrate - third, the well-known and radio-popular cover of John Lee Hooker's One Bourbon, One Scotch, One Beer which is all GT as he rips it up on guitar and that gritty vocal; and the following Kind Hearted Woman with the sublime acoustic slide guitar playing and that gritty vocal punctuated by breaking high notes that declare total commitment. A glorious wake-up call this morning!