PackRat said:Boy that's a tough one. I voted Cummins, because you can't go wrong with one, if your going to work it.
If it's just to be sick and wrong(my personal favorite), I'd go with the Detroit, and make a real screamer out of it. Forget the turbo, keep the huffer, and run dual straight stacks, right up beside the hood. Believe me, NOBODY, will miss knowing that you are out playing with the new toy. *note* Warning-Do not attempt to operate heavy equipment with a hangover.