I was just reading.... about Edelbrock intakes, and the NHRA, and Mopar - they have the Chrysler part number on them so NHRA would recognize them for "stock" racing classes

The LD4B was the small block intake, the DP4B was the 383 intake, and the CH4B was the 440 intake, and it was sold as a part in the Direct Connection magazine in 1968