I just did a double check on this web site
http://www.therangerstation.com/tech...onversion.html and it appears that everything will work from your 2.9. You can also use the same mounting brackets. The wiring is in the same place and just about all the accesories (radiator, A/C compressor, etc.) will work on the 4.0. Im not totally sure about the auto trannys so you might want to get a second opinion on that.