From the catalog, it appears to have vertical dropouts....not ideal for a single-speed conversion. Unless you get really lucky, you'll have to have a chain tensioner hanging off the back-end, which to me, spoils the whole concept of a simple, straight-line singlespeed.
Look for a similar era Specialized Rockhopper or Hard Rock. They are plentiful and cheaper than Stumpjumpers and at least some of them had forward facing dropouts that allow for chain tensioning.