If you don't drill out the knuckle wouldn't you end up with a skinny shaft on the ball joint? At least on top of the knuckle where the drag link makes contact?
CJW; Good question, the reverse taper top mount is stronger than the original joint. The no drill joint process has a large shoulder on the stud that contacts the knuckle face and a interference fit at the top of the factory drilled clearance hole. Plus we have a tapered sleeve that locks in the bottom of the stud to the factory reamed tapered hole. The stud was also induction heat treated to gain a good 30% added strength. Knuckle is stronger because you don;t have the lost material that everyone drills out. Overall, it's a very strong joint and easy to install.
Compliant