I ordered a pair of Fox 2.0 coilovers and BDS upper control arms for my 2013 F-150 running a 6” Rough Country lift. I had the shop install for parts but they came across a problem where the shock was hitting the spindle. My wheel backspacing is 4.77” so it falls under the tolerance of 5.50” for the upper control arms. What could be the issue here?