Im not sure, but a popular swap is to use the steering box off of a f-body car from the 70/80,s (camaros, t/a,s, firebirds,ect.). This box is stamped with a 76 underneath it (dubbed, the 76 box). The swap is usually done for tighter steering, someone may have put one on your jeep, it is very common. The 76 stamp should be between where the pitman arm shaft comes out of the box and the end cap of the box and have 4 mounting holes.
If you don't have a steering stabilizer, that can help some in giving the jeep more of a steady feel and not so sensitive.