It takes a bit more than that, lol. Quite a few people have turboed the EJ22 and there are some build threads on rs25 and nasioc. But unless you have all the parts laying around it can be quite expensive and you are just better off getting a turbo engine and swapping it.
I want EJ20G heads for my EJ22T, which is already a turbo engine. The 20G heads flow a lot better than the stock 22T heads. I want a 20G ecu so I can send it to rob and he puts in a performance chip. I was given a 22T for free and I am going to rebuild it and put it in my wagon.