Replace front shocks 73er Imperial

Hi guys,
I would like to replace the shocks on my 73 Imperial. I got the old one out (cut off). But the new one does not want to go in. I have pressed it together with cable ties, but it is too tight. Track rod and lower rubber stop I have dismantled.
Now I want to loosen the upper control arm. Or does anyone have another idea?
I have loosened the lower nut, but the control arm does not move a bit. Does the upper ball joint have to be loosened?
Thanks, Dirka.jpg
Author: Dirk