Uppers are a piece of cake and can be R+R'd in a bench vice with sockets to press into and out of.

But on the lowers -
99% of the time the outer sleeve stays in .
I use an air chisel to cut a slit in the side of the sleeve and pull it out.

Press the new bushing in the arm, then support the bushing fron the backside when pressing the pin back in or you will push the rubber/inner sleeve out of the bushing out the backside.

trust me, been there done that