Lower control arms help needed.

I have two extra control arms that i was going to install new bushings and pivot shafts. Fo i just press the pins out with a press? Is there something i need to do before?
Also i took a closer look at them and noticed they are a bit differant. It looks like one has sone sort of reenforcement *See pictures*
Also how much are they suppost to move? The end where the pivot shaft is does not really move one the "renforced" one but the other one moves quite freely with very little wiggle.

Thanks!