^OUCH!
SupraOfDoom... I had it done by EastCoastSwappers. They specialize in subaru engine swaps and the such. The engine just drops right in. You'll need the WRX engine mounts but as far as placement they are in the same place. Then you'll have to merge the WRX harness to the 2.5RS harness (which is probably the hardest/tedious task.) Upgrade the clutch and i also think you'll need a WRX front crossmember.
SupraOfDoom... I had it done by EastCoastSwappers. They specialize in subaru engine swaps and the such. The engine just drops right in. You'll need the WRX engine mounts but as far as placement they are in the same place. Then you'll have to merge the WRX harness to the 2.5RS harness (which is probably the hardest/tedious task.) Upgrade the clutch and i also think you'll need a WRX front crossmember.