Correct paint color for a 1970 Dart 8 3/4 axle assembly

They used very cheap gloss black paint. It didn't have the same "gloss" as we associate with gloss today. Using a semi-gloss paint will get you close to the factory color. Same goes for K-members. If you look up pictures of Dave Walden's 4-door Valiant, you'll get all the info you need. It is the highest scoring OE car to date.
1970 Plymouth Valiant