I have some questions I am hoping y'all might be able to help me with that did not quite fit in one specific category. I own a 07 grand prix 3.8 that has the Eaton M90 supercharger in it. My goal is to make it twin charged by adding a turbo to it and keeping the supercharger in its stock location. I have worked on cars and have a good well-rounded knowledge about mine. I understand that I will need to make additional upgrades such as a higher performance fuel pump, injectors, intercooler, and a better transmission; but is there anything else that is a necessary upgrade in order for my car to continue to run well? Also, where do you recommend getting a tune done after I finish my build? I want to make sure I do this the correct way as I begin planning everything out. Thanks!