Yep, that's the one. He also has fine solos on a couple of the Hank Levy time signature charts, "Of Time and Space" and "Ambivalence." Park was a great player, considered by every Kenton fan I know, to have been the outstanding soloist in Kenton's bands of the 70's. Heart troubles at a young age took John off the road, off the scene, and ultimately off the planet at around age 45 (1979, I think).
I have the LP "When Winter Comes." If you ever see a copy, grab it. Honestly, the Kenton rhythm section was better (a young Peter Erskine on drums), but Park sounds very good on it.