Upper Ball Joint Installation

[c10boob]

I have a 71 2WD with disc brakes and am trying to replace the upper ball joint. I have already removed the factory ball joint, but when I install the new one I can still see some of the ball joint's shaft showing between the upper control arm and steering knuckle.

I tried using a ball joint press but damaged the ball joint in the process, and was told by an O'Reilly Auto employee that the upper ball joint does not need to be pressed in, and should go into place when being bolted on.

Secondly, it looks like the hole for the cotter pin is going to be quite a bit below the cotter pin nut..

Any thoughts and/or advice?