You'd have to undo all the work you did if you want to get a turbo bolted in. The entire intake and exhaust side needs to be redone. Best bet to cut your losses is to supercharge, as your exhaust system will work well enough. Buy a SC kit (or piece it together to save some $$) complete with injectors, tune, etc and you're good to go. Someone with more experience could get deeper into detail and help you out with the more technical stuff. Whatever you do, good luck.