Is this the link?
I had this in my bookmarks from way back. I'm surprised it's still live:
E34 Front strut and bushing replacement

Originally Posted by
ryan roopnarine
There's only one way that I'd go about removing an arm from your car--especially if you're trying to save the boots. More specifically, I'd remove the steering knuckle (and the tie rod from it using a non-destructive tie-rod puller) and do it off the car in a vice. Everything you need to do this is available for rental at autozone. Jon K had a post about this with the pics that outline what I'm trying to describe more clearly, but the pic is dead. You put the knuckle in a vice, put a chevy balljoint press over the joint you are trying to get out, and use another puller to pull the works apart. I can't imagine doing it another way without breaking tools and being a bigger PITA than it needs to be. Put the whole works in a vice, give a long-ish ratchet or wrench some average to moderate force and the joint pops out without much drama. All of the tools of appropriate quality are available at AZ; you give them close to 100$ to rent them and you get all of your money back if they get them back in working order.
Ramon
1994 540iA Nikasil EAT Chip
Tampa Bay, Florida USA