super six kits?
While they don't have a kit for a factory style Super Six, there have been a number of aftermarket two barrel kits. There may have been a Mopar M1 manifold with a two barrel, Clifford offers their manifolds set up for a two barrel, and I think Pentastar Parts or one company in South Africa has gotten into the act as well. The two barrel setup officially known as the Super Six was a factory item and not aftermarket. Oddly enough, it seems it never occurred to Mopar Performance to package the Super Six in kit form. Look for Aspens and Volares in the boneyard; it was standard on wagons and optional on coupes and sedans.