The input on the Grand Wagoneer uses a "rag" joint, the CJ box has a large splined joint. The Wagon has a 13-16 to 1 variable ratio box, the CJ has a 17.5 to 1 box. The '80 and earlier boxes and pumps have STD double flare hose fittings, '81 and up use metric o-ring type hose fittings. The fitting in the back of the pump can be changed to match the gearbox fittings so that stock replacement hoses can be used. I had a YJ 14-1 ratio box in a '61 CJ-5, yes it was fast, but not unsafe once gotten used to. (YJs have the same wheelbase as CJ-7s). I now have a ZJ 12.7 to 1 box in my CJ-8, which made it handle much better in parking lots and off-road. You do get more road feel also on the highway. The ZJ box is a bolt in for YJs, but it only has 3 mounting bolts instead of 4. CJs have a larger spline on the input so it requires a new shaft/coupler. I switched my column to one off a YJ along with the steering shaft. Hope this helps, good luck!