AnorakTrev & Ron
Yeh, I agree this isn't a proper Discomix at all but only labeled as such and has Dubbing In The Back Seat added to make it an Extended version, like many another.
The first place I heard this song was on a 1974 Arthur Lee solo album (released under the Love name) called Reel To Real. Great version
more details, including original spelling mishtake, on the Donovan Carless track already mentioned
7inch - Giant KC 4053
A - Donovan Carless - Be Thankful For What You Got
B - Be Thankful Insturmental
Dub On!