My lower ball joints have been in the freezer for at least two weeks while I rounded up the rest of the parts. Now I'm ready to intall. These are the press in ball joints. Is there any installation order between lower vs upper? Do I just use a jack to press in the lower ball joints in against the weight of the truck, then install the steering knuckle? Or do I install the lower ball joints on the knuckle, then jack that up into the lower arm?