If you're looking to do a LSD the best advice is to go with a Quaife. The unit and install is probably going to run around $1k and really if you're in there no sense in not doing clutch/flywheel/pressure plate too making the bill closer to $1500-1800.

ATTS is an electronic version of LSD intended to work correctly only under the preset conditions of the ATTS ECU. Swapping ATTS into anything would be senesless, it's not robust, it's not easy, and it would probably cost an arm and a leg to do.