I think it is possible definatly but would take alot of time and effort and mainly money to get working correctly the amount of time money and effort would be better spent on a car that could handle alot more power , a 1.4 tsi would be another viable option but again I doubt you would gain enough to make it worthwhile over a k03 or other similar turbo conversion to be honest.
And I agree with cheys how much power can a polo handle before coming undrivabpe on the road and without alot of chassis strengthening work not to mention the lack of grip, transmission strength and other related problems.