I'd recommend buying a buildable engine core for your subaru, getting that built (either do it yourself - recommended, or by a machine shop - will probably work well, but will cost a lot of $$) and having it ready to install rather than trying to pull the existing engine out and rebuilding it - especially if the current engine still runs.
How do you feel about those 60k miles used engines from Japan?
(My engine appears to have that "spun bearing caused by cornering-induced oil starvation" problem that's apparently common to EJ205s.)