I am in the initial stages of performing a tranny swap in my 81 CJ-7 (still need to locate a tranny) I would like to swap out the SR-4 and put in a T-18 between the 258 and D300 transfer case. Does anybody have any info on this swap? Easy vs. hard? Any advance adapter kits required? Different clutch? Any info would be a great help. I am doing the research first before I start.