Here's a little blurb from Grassroots Mag. on steering setup...
Ask the shop you are taking the car to if they have done Performance alignments...If they don't know what that is,leave...
They are going to tell you,after they charge you for it,that your car is impossible to align.The tech is going for the factory settings and trying to get inside the allowable ranges in
'The Book".I always bring my desired specs with me so they can see what I am expecting.I went to 3 shops before I found one that would do what I asked with my Mustang that had added performance Caster/Camber Plates...the others would not go "outside specs".
I had the same experience with my '67 Mopar...I added Moog offset bushings on the control arms to help caster/camber on it since it had been lowered.
http://www.ozebiz.com.au/racetech/theory/align.html