easy, fit a larger tranny tunnel for the t5 box. get your sump modded to clear the x-member. use rs2000 engine mounts (or preferably a world cup x-member).
that's it really. you should use a 4x4 exhaust fannymould cos they're smaller.
then you need to sort out a place for the i/c, rad, air filter.
brakes need uprating. prop probably need shortening, but axle is ok.