You would need to cut out the bulkead central section and weld a RHD one in its place, then swap the steering rack, pedal box, brake servo/master cylinder, ABS Pump, all brake lines, most of the wiring behind the dash, plus the dash itself. If you had access to a complete VR6 donor car it's definitely do-able, but a LOT of work and I've never heard of anyone doing it before. It might actually be easier to do it the other way round and transfer the Syncro 4WD system & 2.9 engine into a RHD VR. I know this has been done (There's a couple of 4wd Ventos & cabrios out there)