Best tool to do the job is a ratcheting wrench.
There is no room for a deep well socket on the drivers side, it runs into the Master cylinder I believe.
On the passenger side the AC accumulator (I forget what it is called) was within 1/4" of the nut. I was able to wiggle the ratcheting wrench behind it and use it.
One thing that will mess with your mind is that the original bolts have the metal "flag" over the bolt heads. And the one next to the accumulator has one, but you can't see it because of its location ... and it's just thick enough that you can get a wrench on the head, but not fully on. So it will drive you mad. You can just pop the flag off with a large screwdriver, though.
I had the car at work, had the tire off, and was about to pull it apart and I realized I was missing something. What size nuts and bolts are people using on the Upper Control Arms @ the ends away from the ball joint? Again, this is on my '97.
The nuts for the UCA bolts are all 18mm, at the spindle and the inner fenders .. use an open ended 18mm wrench or break the tabs from the inside.
I found the passenger side near the AC setup a bit of a tighter squeeze on the 89-93 SC's.
- Dan
The uppers under the hood are 18mm. Use a ratcheting wrench. It will take you forever with an open wrench.