yes people have done it.. maybe not in an S13 (i have no idea) but old Z chassis has.. check those forums.. btw are you doing this work yourself or you're paying someone to do it? dont get me wrong but as guys above have stated before.. listing out parts and numbers is one thing.. "building" a motor or even doing a difficult engine swap that requires fabrication is something else.. If you plan on paying someone for this you may as well take out a home equity loan!
btw here is where you can find some info
http://forums.hybridz.org/index.php