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In page The Crunge:

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Prior to 1975, "The Crunge" was only heard live at Led Zeppelin concerts during the band's "Whole Lotta Love" medley and their 1972 tour version of "Dazed and Confused". One example of this arrangement is presented on the live album How the West Was Won, where it also appears with "Walter's Walk" on a 25-minute medley. However, on the 1975 tour of the United States the song was performed almost entirely several times, in the funk jam that would link "Whole Lotta Love" and "Black Dog" at the end of the concert.