First this is one great find --- the new owner is my hero for finding and saving this car ---- with the high impact paint, once cleaned up it will look great. It might be best to fully research the best products needed to retain the originality, and stay with only those if the goal is a survivor car. You might want to reach out to a top auto detailer on what products and steps needed to remove the grime and how to prepare the paint for a renewal.
Body side moldings were a factory option on the 1970 Plymouth Duster 340. You rarely see cars equipped with the factory body side moldings as these cars are 51 years old and almost all have been repainted, where many current owners removed the moldings prior to the repaint. AFAIK the body side moldings in original style form are not being reproduced so once removed they are very difficult to re-attach as the adhesive is specific to that molding and not available.
Back in 1970, these cars were daily drivers and owners wanted to spare the sides from door dings.
These moldings substituted for the factory longitudinal stripes.
In 1970 when I factory ordered my B7 Duster 340, I specified the optional body side moldings, and yes, my car was ordered with the bench with center arm rest optional seat and the exact same steering wheel shown for this car.
Take a look at the factory options pocket guide for salemen on the following website library :
The 1970 Hamtramck Registry - 1970 Plymouth Salesman's Pocket Guide
