Sounds like you are talking about pinion brakes, and top loading rockwells...unless you go with 40"+ tires, and do some hard wheeling, you won't be needing those at all.

Gun it and run it!
1981 CJ5,258,T-176,D300,AMC 20,Dana 30,Trxus M/T 31x10.50, Rancho 5000's, GroundPounderFab front bumper, polyethylene gas tank, aluminum dash, AutoMeter gauges

What this country needs is unemployed politicians.