Did you ask PumaNoob?
The 1.7 is a funny beast, there are a couple of successfully Turbos ones around and there have been a few heartbreaks down it too.
Unless you are super capable then it's going to cost you a lot of money to turbo the standard setup and get it running right.
I'm not sure what you mean by proper turbo since if you turbo the 1.7 it will be using a proper turbo?
If you mean an engine which came as a Turbo then there are a couple of RST engines in Pumas I think, but i'm not sure how this affects handling etc since the block is far heavier than the standard unit.