Unfortunately they can't fabricate another lower control arm (A arm). He said that it's because it holds the spring.

Do you guys think that I could combine this upper control arm for camber ajustement with the caster bushing in the lower arm for caster ajustement? or should I just do the whole lower arm kit? Or would the eccentric bolt be enough for caster ajustement with the upper arm for camber? I want to track the car. I also want to use it as a daily.

Thanks