My brother in law built a supercharged peugeot engine using a toyota supercharger which works very nicely. It's sitting in a 404 which has been modified from the ground up for this engine and the insane power it produces.
Getting back to the original question, 1.7 QV engine is probably a good candidate for the small supercharger and link ecu. It should be a simple matter to mount up and plumb in the supercharger and wire in the ecu. Given that this engine has a map sensor and lambda probe, throttle sensor, ping sensor and crank position sensor it should be relatively easy to tune with the link ecu. Boost is programmable so you could have as much or little as you wanted without needing to massively re-engineer the motor. Probably run the stock compression even with just a small amount of boost.
Could be a fairly straight forward mod.
http://www.alfa-pages.co.uk/enginebaymp32.htm and a nice drive if the setup were conservative. Too much boost could be an unhappy experience trying to keep the wheels on the road. Can you get a limited slip diff for these things?
You might have seen this but if not, read on...
http://www.alfasprint16v.fws1.com/index.html the perils of too much tweaking.