Upper control arm rebuild question

[Rex'69]

He guys I'm in the middle of rebuilding the front end and converting to disks but I've hit a snag. After I replaced my upper control arm shafts and bushings and get them back on the frame one of the arms is stiff moving up and down and the other is very loose. The stiff one will hold itself sticking stiaght out (I don't have anything connecting the upper and lower control arms yet) and the other falls down. Both the lower control arms feel stiff like the one upper one. I don't want to move on if I mess something up. Anyone have any ideas what could be wrong? I would image they should move up and down with the same force but they're not even close. The large greasable nuts are all torqued the same on both upper shafts. Any advice would be must appreciated.