what is original, what is rare option, what is not?

489 case 8 3/4 after 1970.

push bars look to be bolted to factory bumper guards after removing rubber part.

Can't tell from C in VIN other than 225.

Trailer package may have come with dual mirrors.

Interior is factory Dart SE or Valiant brougham.

If it's an SE it should have had color keyed hubcaps. It is one of the correct colors for the SE package.
Does it have puffy door panels and a padded deluxe dash?

Let's see the fender tag.