Sorry to break this into two posts, but I wanted to see what your engine and transmission was.

Like what was said above (which you probably understand by now) the easiest way to use these doublers is to swap the mitsu tailhousing (the casting that encloses the back of the transmission and provides the mounting surface for the t-case) with that from a newer model Jeep AW4 and modify the Jeep pulse ring. Also, very slight modifications to the transmission shift cable bracket need to be made, but that's pretty simple.

Toasty laid it out well that the clocking ring for the NP231 could be replaced with a custom adapter plate for the Mitsu case.

The electric speedometer can be very easy to adapt. My NP231 was a gear driven speedo output similar to what a mechanical speedo would have. I unthreaded the Jeep sensor from the housing, got an adapter square key from Autometer, and screwed the Mitsu sensor in place. The threads aren't a perfect match, but they are soooooooo close. <img src="/forums/images/graemlins/notooth.gif" alt="" />

Hope this helps, again, sorry for the late response. <img src="/forums/images/graemlins/cheers.gif" alt="" />