Lots of information on how to build a 47RH/RE on
www.CompetitionDiesel.com user "Big Blue24" has very detailed and picture filled posts.
The 47RH is ideal in a conversion/swap because 1-3 are shifted hydraulically, and you can control TC lock up and over drive by toggle switches.
I'm currently trying to find a RH core to build and swap into my 97 Dodge in place of the NV4500, but the RH's are a little harder to find only being used for a couple of years vs the RE's.