Here's an idea: How about a supercharged version for the Sportcoupe, basically a Stage 2 blower @13psi/0,9bar boost pressure for the largest or second largest engine?
Seeing as today is your first day here, I'm going to ask that you check out the posting guidelines and the forum rules, if you haven't already. If you want to try to make something on your own, it's not easy, but there are several guides on the wiki and the forum.