Then you'll need a good thin BUT STRONG prybar to push down the lower control arm to give the shock room to come out of the control arm at the bottom.
....uh...yeah....don't do that...Let me explain..
You are changing springs to change ride height, so both the upper and lower arms will be in a new lower position after the install. If you do not loosen up all the arms they will be trying go back where they used be and in doing so will prematurely destroy the pivot bushings, and yeah a lot more work to get that shock back in...
This is Suspension 101 and a lot of guys miss this one...
....oh yeah if you replace any arms with aftermarket arms with spherical pivot bearings this does not apply and the install will be much easier...