The car uses Fatman 2" drop Spindles with Killer Customs Tublar Upper Control Arms for the best geometry and no upper Ball joint bind ( as i have seen is a major problem with the brand of upper arm we started with i would check yours if the car is low)
and QA1 adjusted all the way down.......... as for how much we lowered it i am juessing at 3 to 3.5
We had changed to a Unisteer rack, and they supply arms that are a little shorter in length to increase the steering. we have 19" front wheels and YES we had to mill off 1/4" on the tie rod mounting surface and re taper the bore. and now there is about 3/16 clearance from the tie rod end to wheel. but that is also with an offset hub we built to move the wheel in 5/8 of an inch to reduce the scrub and give more inner wheel well clearance