Lower ball joint holes too small for my Kelsey Hayes spindle bolts.

I think the ball joint is a 'small' ball joint and the bolt is for a 'large' ball joint. I noticed this when I had to buy new bolts for my conversion from small ball joints to big ball joints. I bought bigger bolts (in your case you'd want smaller bolts) from Dr. Diff. Assuming the holes the same size for the ball joint vs the steering knuckle(?).