Front Disc's Rubbing on Lower A-Arm

[steveb64]

I installed CPP modular drop spindles on my '64 C10 and have run into a problem. The disc's I bought are the standard 11" or 12" 6-lug also from CPP. The problem I am having is the very end of the a-arm rubs on the disc. At first I thought maybe I hadn't seated the lower ball joint all the way, but I had and it's torqued to specs. Another thought is that the spindles were not machined correctly by CPP. Anyone else had this issue? I appreciate any insight you may have or ideas on how to fix.