To eliminate the vac engage 4x4? Look down the categories at the stickies for the options on how to. Other than that what else are you wanting to eliminate?
There is barely any other vacuum on the YJ besides 4x4…there is one line to open and close the heater air supply. There is one to control the fuel pressure. And another to operate the brake booster. One for the MAP sensor And a final one for the charcoal fuel canister. Those are all very low issue items. I’d say once 4wd vacuum is eliminated then you are good. This ain’t a 4.2 with miles of vacuum smog equipment.