I was wondering if anyone had considered the idea of swapping in the Orion t-cae with 4:1 low range on thier BJ. I've been considering this for some time now but have been hesitant due to the fact that there is no listing on Advance adapters site for a companion to my 5 speed tranny. Is there much difference in the 5 speed that I have and the 4 speed that advance adapters lists. Will this T-case work for me with little or no modification. Is it worth the $1500 or should I go with an alternative. My T-case is in need of a rebuild so any option would require me to undertake a rebuild. 