The whole front suspension is tied together and I wouldn't recommend touching it unless you have the proper tools, which include some way to measure toe, camber (and caster which is the same gauge). To do this, you need a perfectly level surface which implies a laser level as well.
This is all in relation to the front suspension:
- If you rotate the front lower concentric bolt so it moves the front of the a-arm out, you will get more negative camber, you will lose some caster, and you will get a big change in toe (goes in as you add negative camber.
- If you rotate the rear lower concentric bolt so it moves the rear of the a-arm out, you get more caster, some negative camber, and a smaller impact on toe (again to toe in).
- In general, the process is to set camber, then caster, then toe as each of these sucessive changes has little impact on the one before it.
Making it harder, the concentric bolts are just that, concentric, not round, so the same rotation on each side will only result in the same change to camber/caster if the concentric bolts are in the exact same orientation on each side of the car, which is very unlikely.
If you don't have the right tools, I would take it to an alignment shop and let them do it. Give them the exact specifications you want and they should be able to get pretty close.
