When my father worked at the plant it was not as uncommon as you might think, that when a car was an employee purchase, certain liberties were taken on the production line. On my brothers car, they dropped in a motor that was not an option, added all sorts of other items to the interior and drivetrain. He had a rough time getting parts from the parts store though as he always had to say I have this motor or trans, don't worry about the car! He even had a really nice factory tag riveted in on the car that said specially manufactured for.... wish he wouldn't have totaled that car......... can you imagine what that could have been worth!