You can get the ball joints out in about 2 or 3 minutes each,
without a press, but you will need a press to refit them.
When I did mine (all 4) I had access to a 40 tonnes press, and couldn't press them out. They are a right sod without the correct jig to hold the arms still/steady.
This is how I got mine out.
1. With angle grinder, grind the back off of ball joint. (Mind the arm, grind ball joint only).
2. The above will then allow you to knock the swivel pin through and out, leaving just the outer ring / shell. (This also alows you to knock off the camber bush, from the top 2)
3.
Carefully with a hacksaw inserted through ring, cut through ring/shell only (
NOT the ball joint arm). You may need to do this opposite each other. The ring/shell will then collapse in on its self, and fall out, leaving just the bare torsion arm.
By the 4th one, it took me about 2 or 3 minutes to do.
The new ones went in nicely with the 40 ton press.
J