Double adjustable rear upper control arms???

I have the MX which uses upper and lower rear control arms. While disassembling the unfinished kit I noticed the rear axle is not centered side to side. I haven't checked other measurements yet. I have not installed the engine, 2015 Mustang 2.3l EB, since I haven't determined it’s placement yet. But, I think I need to “fix” the rear axle first. I've read where double adjustable upper rear control arms MAY help with centering a rear axle side to side (I need about an inch toward passenger side). Has anyone had success using double adjustable upper rear control arms to not only adjust pitch but lateral movement? It seems there would be conflict in doing both pitch adjustment and lateral movement (side to side).
Thanks!