My best friend had an 84 Z28, so I remember that interior well. Later, I had an 84 Mustang GT, which was far worse, speaking of cheap interiors.My 84 z28 had beautiful lines from outside and the most pitiful cheap looking interior.
If I recall, the Mustang (not specifically GT) was always marketed as "the least expensive V8 car in America", for at least the first 20-30 years of its production.