White with a black interior. Done. I can just see the salesman's face. "Nope, no power steering, no automatic transmission, no tinted windows, no AC, etc,...) I just want a white truck with a black interior".
Could well have been a year-end case where stuff just got put in however the materials were left over.
Then again, it's painful to watch AM/FM/CB radios and Firebird honeycomb alloy wheels getting the sledgehammer before being thrown in the dumpsters for recycling at the end of a model year.