Car sways all over the road

thanks for the update, I have the exact problem with my car. I bought a unisteer drive shaft, bumpsteer kit, inner tie rod ends and ball joints. Also MM caster camber plates. I havent installed anything yet. I hope once I get everything put together it will also eliminate this problem.
 
I know the mm shaft is expensive for a street car but... There is an alternative. You take your stock one and bolt/ weld a universal joint on it. I belive junkyard dog (youtube) did one.
 
Does that shaft have any slip joint in it, for the length to change? I read that the later rack had to have a slip joint in the shaft or it would start leaking at the input shaft.