So, from what I understand, you are trying to remove the top nut of the strut to remove the springs in order to swap out the new struts?
If so, then you can use a spark plug socket, with an extension shoved through it, and place another socket at the end to hold the shaft and keep it from moving. From there, you use a pair of vice-grips (or similar tool), to turn the strut nut and remove it (while placing pressure on the shaft to keep it from turning). There was a good diagram that was on this site, but I don't remember where it was. **Edit**, just found a picture of what I am trying to say on SRTforums.
If that is not what you are trying to do, then sorry, dismiss this post
-Chris