Thanks, Abe. After looking at it, I'm now wondering if I can replace the ball joint without removing the control arm from the car. Seems to me that I should be able to just 1) grind the rivets off, 2) pop the ball joint out, 2) bolt the new one on, 3) push the new one back into the steering knuckle, and 4) bolt it down.

Just wondering if anybody out there has done it this way?

Thanks in advance