Does this apply to both the 4BT and the 6BT or the 6BT only ?I looked into this for some time myself. As far as I can tell if you have a diesel NV4500 you should have the correct input shaft and the correct bellhousing for connecting with the Cummins. the one thing you are going to need is the adapter that goes between the Cummins and the bellhousing. Wrecking yards have this part. Also you need the 6BT Flywheel. SO to sum it up you use all of the Dodge truck parts.