I just put lower ball joints on my 90 trooper , and they fit great , no clearance issues at all.Thjey also have the zirk fitting on them for greasing.Not sure if the pics show them too well , but feel free to look at the pics of my project , it does have pics of all the front end stuff I did , lower ball joints , uppers , tie rods , etc.

1996 Jeep Grand Cherokee 5.2 with mods.Hughes Air gap intake , 52MM TB , ford injectors, 2 3/4" lift, Doug Thorley headers , HID headlights with LED , HID fog lights , glow gauges , a few others