From what I've read you can alter you're pinion angle by using adjustable lower control arms or an adjustable upper control arm. Is there a preferred method? I would guess that after lowering you would have to shorten the lower control arms to adjust the pinion angle back to within spec. I'm looking to add tubular lower control arms and relocation brackets for my Boss which is lowered about 1.5". I guess the full question would be is, since a non-adjustable arm is cheaper than an adjustable one, which would be the preferred choice for where to have the adjustment at, upper or lower or both? This would be for autocross, open track use.