IMHO...I think you would be better off with one of the 4bbl ones..If you have to use multiple carbs then the Indy crossram would be my choice...I know NENDRA rules will allow a single 4bbl but most of the Hemi guys are running the Indy crossram.

The Indy 426-6 manifold looks like a good upgrade from the stock manifold that will allow for the stock aircleaner....the Stage V mainfold requires using a different AC set up which can complicate things...