New episode of " NAME THIS PART !"

Interesting. This 1964 CSS sales brochure says the seats were dart and the console was polara.
You can tell the seats are from a truck because of the track brackets, different from the Dart. Otherwise I think they're the same.
Useless trivia: The early Sweptlines were also known as the "Dart trucks".
The rear ashtray in the Polara console may have come in handy if it were in a crew cab pickup! But I doubt there were any CSS crew cabs produced...