I believe that the 94 up struts are 1" longer. I've seen people use them before, but if your car is lowered at all you may have problems bottoming out the struts. Stick w/ the proper strut in my opinion!
84t-top is right. They are longer. But if you have SN95 spindles and your car is not lowered much at all, you can use them. SN95 spindles have a lower mounting point, thus the longer struts. I have Bullitt struts with my spindles and don't really have a bottoming out problem. Some guys have used the spring & strut packages on their Fox cars and they work out pretty well.
I ran into the MM article while researching shock options. It did get me thinking a little, but I don't have any experience with the SN95/Fox setup nor have I run across anyone that has used it.
I have seen that people use Mach 1 or Bullitt springs and sturts/shocks on fox cars but I havent seen anything bad or wrong with it.... maybe someone here who has done the mod can comment.