Only four tracks out of eleven are more or less faithful to the original recording.
1. Harper - Main Title 6. Mexican Breakfast 9. Temple of the Clouds 11. Finale (Susan)
While it's no means a replacement for the original tracks, I would at least hope that the re-records evoke the spirit of the film and that free-swingin' era.
*Does Isometrics* (see the film, get the reference!)
I also dig the Andre Previn song "Livin' Alone" that is briefly featured. It makes me wonder if Previn might have been originally slated to score the whole picture. This is about the time he decided to exit Hollywood. He became music director of the Houston Symphony in 1967.