did you know that Edelbrock still sells 6 pack intakes for the 413, 426 wedge, 440? Not that they have any in stock, but then, Holley is out of stock on the carbs that mount on it too.

https://www.edelbrock.com/edelbrock-ch-6b-six-pack-intake-manifold-for-chrysler-rb-series-engines-2475.html