It isn't a 6 speed... But I have an NV4500 for sale in Atlanta. It has the 6.34:1 first gear (only available in limited GM 1 ton trucks) but built in a Dodge case so that it bolts up to a NP231 T-case. I also have the Advance Adapters bellhousing that bolts up to a 4.0L, as well as a external clutch slave set up... $1500. It is a beast, but you won't break it... ever.