i put a built ej22t into my 03 bugeye, the stock 2.0 was veryyy tired haha, and a buddy has a 90s outback he'd sell me for 200 so i think ill rebuild my 2.0 and transplant it for a nice lil sleeper.
as far as everything boltin up it should be fine, but the only problems that should arrise will come from the wiring. a wrx ecu should be swapped in, or a stand alone unit, and it will need to be wired into the cluster, etc.
best of luck ill be followin along to gain insight for my possible future swap.