geez i think the front suspension is more interesting, appears to be running a double wishbone front end. i would expect the rear to be different as well if they have gone to so much trouble to mount the engine further back and convert the front end.
may be using nissan IRS cradle etc plus Nissan up front as well (skyline series front sus?) 5 stud rims sort of give proof to the theory.
would be keen to see if anyone has any more info on this thing..