is it from a 200sx turbo? You realize stock it only has 135hp.
Granted you can throw on an intercooler and boost controller, but it still wont be very powerful. I think stock boost was 5psi. A newer turbo might help too. Also I hear Euro cams will free up a little more hp.
I think motor mounts were in a different spot for s12 vs s13. I would check though.
If you still want to try it, youll need the engine, transmission, wiring harness, and ecu, plus whatever nick-nacks are needed for any other engine swap.
If you can find a s12 with the ca20e you could use the turbo parts on it and possibly get a little more horse power out of it.
More info can be found here:
http://www.club-s12.org/
I would recomend selling it to one of the members on the club-s12 forum and buying a ca18det. But that's only my opinion.