I believe like Mustangs, they have an 8 inch. The only 289 I can think of that would have come with a 9 inch would be the K motor cars, of which there were none in the Cougars. I am kinda sure, but not real sure.
lol, I was in a situation once where my sister spilled some water on the keyboard. Some keys stopped working altogether so if I wanted to type something I had to copy and paste letters or general phrases.