At the rear, yes. At the front only toe is adjustable.
I would keep the geometry stock at the rear and use either SuperPro adjustable ball joints, or adjustable top plates at the front to play with camber. I wouldn't go any more than -1.5 at the front personally. Stock is -0.5 for reference, and zero toe.
Aim for as little toe-in / toe -out as possible if you want to experiment. Race cars can use such things to their advantage but on a road car you want as little geometry influence as possible to avoid any nasty surprises mid corner.
