cams dont affect the idle on a diesel. i've seen trucks with about a half dozen different cams and as long as they have proper injection timing and properly sized lines they dont lope.
crazy lope comes from timing, incomplete combustion at idle and a few other things. if you think lope is so cool, try to drive one on the street, where automatics stall at every light, and the manuals become jerky and hard to take off smooth in.
I prefer to have a truck thats tame/quiet at idle, then just screams to life at about 2000 rpms up to 4000...but if having a truck that sounds 10x more bad than it really is and not having the balls to back it up is your thing...just pinch 3 of your injection lines with some vice grips to restrict the flow and it will lope like the big dogs.