A little know fact:
Caster is the only front end angle where it realy dosen't make that much difference whether it is positive or negative. It is not a wear angle like toe in or camber. Most alignment people think that you can only have negative camber but don't know their front end geometry very well. An alignment guy that has been in the busness a long time and realy knows what they are doing other than setting the car to what the book says will know. A lot of control arms have been replaced or bent over the years because most alignment guys don't know this.

Does your 944 have regular suspension or Multilink? Steve's reply below may have more to do with regularly sprung cars than those with MLRS and Nivomats. Just a thought, anyway.
JD

Very coincidental that you should post this question at this time, as I was going to post a message on this topic myself.
I just got in the door from spending over 600 bucks (Cdn) at the alignment shop on our 92 960 with Multilink Rear Suspension. At the shops' insistence I had the 4 bushings for the lower inner track link mountings replaed after being told that they were shot and that there was no more adjustment left in them. I also replaced one track rod as it was slightly bent. The result? The rear end still has almost twice the camber it is supposed to have.
The car rides like a dream, and ther is no unusual steering effct or tire wear. It has been like this for a couple of years, so wear should be evident. ther are new Nivomats on teh rear, and they work well.
The only reason I want to get this fixed is because it looks like crap from the back, with the rear wheels cranked out like a micturating female hound.
There must be something else bent, but I can't find it and neither can the shop. the closest Volvo dealer is over 8 hours drive away.
The final specs tonight were: rear total toe 0.29 (specified range is -0.3 to 0.17), left rear camber -2.7, right rear camber -1.3 (JUST in spec).
I have no clue what to do next, but this is getting expensive.
J Dymond
Fort St. John BC
84 240GLE
89 760 GLE
92 960 (the culprit)
65 1800S

Spring sag can cause negative camber and this is common on 940s. Before you start drilling and hacking, check the ride height per FAQ instructions. You may just need new springs.