Drop spindle install

[MASTERBrian]

I am getting ready to install my cpp drop spindles on my 1960 suburban. I've watched a few videos and it appears some applications the ball joints get taken out, others they don't. Do I need to remove them on my '60? They look to be riveted in, so they may be original, from what I can tell they seem ok so I hate to replace if I don't have to.

Any pointers here? Does the control arm drop once the ball joints are loose or not? Amazingly enough I've never removed a spindle before.

Again, I realize I might kick myself for not replacing, but as I'm sure everyone is aware, they aren't cheap. Now, if I do replace where's the place to buy them? LMC carries them, but no idea on quality.

Thanks