I have an 81 CJ and replaced the steering box with one from a Hummer. This is a variable steering box. Conbined with a brace, this really helped. Also ran my 37" tires with about 20 lbs of pressure.
Old jeeps mark their spots. My wife drive an 81 CJ7 but just on weekends. It has a 6" lift on 37's. I have changed all the steering and it is still requires vigilance to drive. Have fun. Be safe.