Is there a dual plane 4bbl intake available instead of using the restricted 2bbl intake ? With a dual plane I mean a plenum that is divided in two separated halves feeding 3 cylinders each. With an adapter it's possible to use a 38DGMS/DGAS/ DGES or other simultaneously opening 2bbl carb. It makes the carb appearing like two 1bbl carbs, but without the hassle of synchronization or building a linkage. Below as an example an Opel six cylinder 4bbl intake.