K/h disc brakes lower ball joint issue

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

Wasn't this discussed by you, in the other forum?
What happened to looking up the numbers in Rock Auto?

Then, just drill out the mounting holes to 9/16 inch.
No big deal, don't loose any sleep over it, not going to hurt anything.
Why make a mountain out of a mole hill??