The ball ends are pressed into place and riveted. There is a chamfer in the steering arm on the side opposite the ball. Drill a hole partway through the ball stud and use a large drill bit to cut away the metal that's peened over the chamfer. The ball stud will drive or press out with a lot less effort once that's done, with no damage to the steering arm.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!