Even though I don't even have the car yet I can tell you this much, if it gets a trans swap it'll be the Passon, because it will fit, it's strong, and I already have it. 3.91's are an easy choice since I have a brand new complete Yukon based Dr. Diff unit already as well. If it needs something else down the road in either case I'll look at my other options when the time comes. Andy, what does a CF drive shaft run these days?