I wouldnt do it. The Mustange is not built nearly as well as your BMW. I think the top speed is limited to 108 mph or something ridiculous like that. I also saw a video of the drive shaft breaking at high speed. Go and test drive it though to make a final conclusion.
COBB / AR Downpipes / ER FMIC + CP / AFE Stage 2 Si / Forge DVs / HKS Exhaust