I just heard about this concert from 1972 billed as the black woodstock and watched the documentary about it on youtube. Theres some really great performances including the reason I originally watched it for albert king also though the one below the bar kays son of shaft is superb and funky as hell. Here it is in its entirety!

I have the DVD and the soundtrack CD

My father and my late uncle went to that concert.

I've heard them talk about that show. It was a HUGE event for Black Los Angeles during that era.