suspension question

ok guys sorry for asking such a stupid question, and i know its probably been covered a million times. but i was wondering, i just bought a set of eibachi pro kit lowering springs for my 01 stang gt. and i was wondering do i need to buy a caster and camber kit? or can i get buy without it?
 
Yes you need them. I have the same springs with a V6 and my front end is SLAMMED. While you are at it you might as well install the Motorsport ball joint which is the same as the Steeda x2 ball joint only cheaper because it doesn't come in a box that says Steeda. It will help keep your ride from feeling like absolute crap. If you can, I'd return those springs and buy some H&Rs.