It was used in the Durango's for sure and quite likely the Aspen. I was just looking at headers yesterday but found nothing specific. So now I am thinking bigger throttle body, headers and maybe free flow cats. For the size of the displacement, there should be a decent amount of power left in it. I might call a few performance shops to see what they might have done or if they have any other options. If I could eek out 330 HP w similar torque gain I would be a happy guy......