Had a BS27HOB with PRX9 interior and no woodgrain in the panels.

However, I believe that when leather was ordered in a 'Cuda or Barracuda, then one was to get the woodgrain in the door panels, and an overhead console (at least in '70).

If you ordered the salt+pepper cloth interior, you would get red inserts instead of woodgrain.

I have a few sets of 'Cuda panels (and have had more) that had either the woodgrain or the red stripe inserts. And I do mean 'Cuda, not Gran Coupe.