CPP Modular Spindle not fitting lower ball joint

[lsjrl07]

I have a 1971 C20 Long Bed that I am converting to a 6-lug truck and bagging. I have multiple CPP Parts going into this build, and I have the Modular drop spindles. My issue is that the spindles are not fitting the C20 Ball joints that installed into the arms. It is almost like CPP forgot to ream the bottom holes out to the C20 size. Anyone ever heard of this? I called CPP and they confirmed that I ordered the correct spindles...I plan to start a build thread soon.