This JHM video seems to indicate you could be better off upgrading headers etc to get the best all N/A power out of it, vs adding weight with supercharger.
Both routes are quite expensive I imagine. I looked into well made long tube headers and the cost seems to be in the region of £2.5k minimum.
Personally I think its not worth it, unless you know someone or are a really good mechanic / welder and can make/install/test things yourself.
If you want a faster car best to buy something with bigger engine and lighter.
https://www.youtube.com/watch?v=3n7xVwjWWD0