There are a couple of different 2.016v engines in the pug range.

Depends which one.

Karl has turbo'd the Mi16 and said his GTi6 was rebuilt (by him) with the idea of turbo charging at some point

BUT

The issues are the gearboxes I think...

Its not something thats done very often to be honest.

Try the 205 drivers forum- but be carefull of people who know more than they think they do....