A T-18 or NP435 would be an easier install if you can do without the overdrive. You may need to change input shafts or add a spacer in the front of the 4500. At the rear you need a Dana 300 or NP231 t-case adapter. It will be long, if you're going for a lot of lift, a rear drive shaft may be tricky.
Try Advance Adapters at
http://72.20.96.178/commerce/ccc1241-nv4500-adapter-packages.htm
or Novak adapters at
http://www.novak-adapt.com/knowledge/knowledge_gateway.htm
Bob
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