Pepper's live a Dantes volumes are pretty good. I think Vol. 2 has two songs on it that last 20 minutes each.
The highlight is, the drummer for that engagement and on the cd, is nick ceroli, the drummer for the Tijuana Brass (herb alpert) at the time, and Art Pepper introduces him, "A very very successful drummer! Mr. Money himself! (audience laughs), mr Nick Ceroli." Then two seconds later, ceroli says, "I Ain't got no money at all!" And Art laughs.