I like the idea of putting in the 205. Im running a Ford 205 behind a T18 and its indestructable. The low range isnt as good as the 300 but Lo-Max makes a upgrade for the Chevy 205 if you decide you want to upgrade. Obviously there are low range kits for the 300 as well. Im sure there are others on here who have it, but I know that my YJ frame has only an inch or two between the side of the case and the frame rail. Im just wondering if you will have clearance issues with the case being so big in a CJ frame.