I hope you mean front end...because from the firewall south they are pretty much the same...having that said you could easily do a front end conversion but maybe that's not you...whatever you do think it through...if you have a ton of free time check out
North American Subaru Impreza Owners Club
IWSTI.com - The Largest STi Community on the Internet! and other scooby forums....are you looking for a high output car, rally demon, or just a fun adult toy<--that sounded so wrong!