I agree with Marc, you will need to correct both steering and tca. I would weld some new mounting points on the existing hub, switch to 3dr hubs or get some 18"s and highten the car. The sapphs are horrible when lowered as the roll center is far under ground while the center of mass is way up.

The extension showed in the pic above is just making things worse imo as all it does is introduces bending moments where you absolutely dont want it.