I do have the recent One Way Static release, its slightly expanded, a digi-pack. There's a difference in sound quality though, RRR is clearer, no hiss, good score IMO very weird.
I saw this in its natural setting - at a drive-in in the early '80s - complete with the end credits being allowed to play out; but none of the only bit(s) of Nelson Riddle's scoring that I remembered were on the OST (i.e. the brief arrangement of "Harper Valley P.T.A." repeated ad naseum as a punchline for the "P.T.A. members humiliated" gags).