The problem with fitting a FWD kit to an AWD car lies with the downpipe,because of the transfer box and driveshaft on the quattro there isnt much room for the downpipe,unlike on the FWD car.
Re LHD/RHD I'm sorry, I didnt see your location there!
Is there an MTM agent in Brazil? If so it would be worth talking to them first about there 345ps big turbo K26 setup.