you wont find a bigger 77's fan out there than me (other than stalker-obsessed should-be-in-jail type fan, of course).
that live album would be "88", which the re-release in 2000(?) also comes with "When Numbers Get Serious" which is a cd of live snippets and cover tunes. If you like either of these, you gotta pursue their studio albums, awesome stuff. nobody like 'em.