One good upgrade is a jeep j20 steering box from the early 80's, i think mine is from a 79????, and all the fittings are the same and the steering shaft appear to be the same, so it shoudl bolt right in. It has approx. a 3.5" piston while the stock has a 3" piston. The AGR box IS a revamped J20 box. So I guess you can say the AGR box is no better than a stock J20 box, but it IS better than the stock XJ box. _nicko_