When lowering cars you get negative camber. As long as the tabs hold up you can adjust it to stock settings or anything you prefer.
H&r are stiffer springs and prolly eibachs would be better for drag since they are softer and give more load to the rear. But they will not drop it as much nor will they make it look as good. The eibachs completely suck for everything else other than drag.
H&rs handle wonderfully for the corners tho. Its up to you tho if you want it a straight line car or you want it a all around car.