Wow, the Keyhole releases keep a comin'! http://www.amazon.com/Bebop-Tango-Conte ... ebop+tango
"With the success of his Apostrophe and Roxy & Elsewhere albums, 1974 saw Frank Zappa at his commercial peak. Evidently feeling a surfeit of goodwill towards his fans, at the close of the year he prepared a personally mixed reel of live performances from the previous year for broadcast on WLIR-FM in Garden City, New York, on New Year's Eve. Not to be confused with a show he was playing the same night in Long Beach, California, this is a typically adventurous and humorous compilation, and is presented here with background notes and images."
If the sound quality is up there, this looks like one to grab.