Best double live vinyl?

+1 for At Fillmore East - Allman Brothers

+1 for Waiting for Columbus - Little Feat (saw them last night in B'ham AL; still a good 2-hr show, much setlist overlap)

Little feat all the way!  You probably are unaware that Paul Barrere and Richie Hayward have both passed on, so do not expect a tour anymore.  Too bad, I have seen them live at least five times and will miss them.

Since the question was about double live vinyl from the '60s and '70s, no question in my mind it's Allman Bros. at Fillmore East.  I was coincidentally just listening to Frampton Comes Alive Deluxe Edition... don't bother.  The original is far better, but still nowhere as good as ABB at Fillmore.  The only live Jimi record I remember from those days was Hendrix in the West, which was a single album, and a compilation of cuts from various venues.  James Gang had a good live album, but it was only a single.  I've always thought Zep and the Stones were far better studio bands than live bands.

@boxcarman - Lowell George died many decades ago and they've continued to go on since; have they stopped since Richie and Paul died? 

Gotta give a shout to Zappa/Mothers-Roxy&Elsewhere.  Pretty close SQ wise to Columbus given Franks sonic perfection personality.  There are some overdubs on it though.