I think the 6.2 with the new torqushift transmission is the way to go. The 5.0 is a great motor, and has lots of good features, but I think its a better choice for a mustang, or street car. 11 to 1 compression in the mustang and runs on pump gas. Pretty much they say with forged lower compression pistons its perfect for turbo's or superchargers. The 6.2 seams to be a good motor though. I haven't read about it except that it replaces the 5.4 and gets more fuel economy than the 5.4 did.