My 383S has the N85 tach option but 120 speedo and no frills dash and interior. Not surprised as ‘Cuda was the stripped version basically. It’s all about the options ordered. My car was basic S 383 with PB/Disc/tach and light option. Many were ordered this way. Heck the S came standard in buckets and console.
The full feature deluxe interior with blacked rally dash are fairly rare and you have look hard and deep to find the ones that are trully original. Maybe I am wrong and standard interiors are actually rarer! But more than not, I see cars that have bling that does not match the fender tag.