I thought this might be of interest to everyone. My '98 Impreza RS's rear seat fit in my '92 Legacy Sedan Turbo. The fit is not perfect. It required a little force to install them, but I don't expect any problems. I lost trunk access via the fold down seats... but I don't mind. They look a lot better than the stock seats.
For more information on this visit my page detailing my transmission swap. I'm ALMOST DONE! I'm just waiting on a new downpipe before I put the rest back together.
http://www.shimmysideways.com/tranny_swap.htm