Originally composed in 1971-2, the idea of Metamorphosis was of a gradual change of style and material from start to finish.  Beginning in a sort of post-Hindemith style, the slow middle is a dreamy Berio-influenced evocative wash.  The last part was mostly infuenced by the fluid counterpoint of Mort Subotnick's Wild Bull.  It may be thought of as three loosely defined movements, strung together without pause.
This recording is with John Balme.  It was subsequently performed by the Indianapolis Symphony Orchestra in the late 70's under Oleg Kovalenko.
The score posted here is an excerpt -- the first 21 pages -- and is the definitive one.  It only exists in legal size.  Other scores in full size (11 x 17) do not reflect the revisions, nor do the parts.  The audio file reflects the first half of the work, and is faithful to all versions.  Revisions happen mostly in the second half.

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Parts for the performance as well as the revised full score exist at the McLean Archive at Crane School of Music, SUNY-Potsdam, but the parts are only for the unrevised version. For a performance, new parts would have to be copied.