Maybe we are all talking about the same thing, but my red owners manual IS late-model specific, in that the AC controls are the Maserati style as opposed to the slide controls of the early cars. Tire pressures and sized have also been updated to include the 285/40/15 and 345/35/15 tires.
Granted, 95% of the manual is identical to the early cars, but there are some pages that have a rather crude photocopy with updated information. (offhand I can't think of any differences except for the AC and tire pages..)