All the dash tops in BJ8's were black, as were all door top rails, from the factory. No mater what color the interior was. BJ7 not so sure about, being I have only done research on the BJ8 that I restored.
Some people, including me, have changed the color to match the interior. If you change the color, it will be noted that the car is now not "correct", given you're having the car judged.
The rest of the interior would have been consistant in the same color. Seats, side panels. The rug may have been a different color, in some models.
I remember seeing a chart that showed a breakdown.
Exterior color and interior options, for all models.
Maybe someone will provide a link to that?