Not trying to discredit Art or the other gentleman, but the underground following of the 3.0 cars has made advances since Cliff's car. Snoop around on turbo-mopar.com there is a lot of knowledgeable people over there on the Mitsu motors.
This guys thread while not legal for a stocker for obvious reasons sheds some light on the potential and strengths of the motor. He's also very knowledgeable on the powerplants:
http://www.turbo-mopar.com/forums/sh...ad.php?t=40686