Has been done serveral times before, so won't be too hard to do.
You'll have to modify the engine mount to make the engine fit. iirc people used the MK4 CVH mount.
You won't need the MTX box, the BC/IB5 bolt onto the engine. Just make sure you use a non-MTX flywheel/clutch setup with CPS holes.
You might have to modify the inlet. TB might hit the brake servo or master cylinder on RHD cars.