Vectorx2, I know the fun of having done something new/different. I know someone who boosted a savvy. Not extremely, just enough for 160 hp. I could just imagine a swift owner that disturbs that innocent savvy. Ha ha.
Supercharging is a bit different from turbo. U should study the particular sc unit you planning to use, Don't simply trust shop 100%. You have to understand the pros and cons of the mod. For one is reliability/maintaince. If you were doing this to an old car/second car, i'd understand, but if this is your only car, I don't think it's a good idea. One thing about doing things differently is that the workshop require time to think about setting/installing it right, if you rush them, then obviously work quality suffers. This is also assuming the shop people is very motivated in the first place. :P
Also, if you start increasing power, you may find the standard Saga BLM parts not up to par. Like suspension or brakes, just to name a few.