I just saw this post. I have had an '02 LS6 cam, an Comp custom grind which was like 550 lift or so and 222/228 on a 114. I am now running an off the shelf Comp which is right around .600 lift and it is 224/230 on a 113. The LS6 cam did absolutley nothing for performance. The first Comp was good for about 20 hp over stock and I am not sure about the current cam 'cause I haven't dynoed yet plus I cahnged other stuff, but I really don't see much difference in them. The Whipple doesn't seem to care much about the cam specs (as long as it is in the ball park)

 

My current cam is a 216/218 on a 114lsa custom from Futral. I like it. It doeasnt have a very aggresive lope at all, kinda keeps you in a sleeper mode, except my damn exhaust is loud as hell,lol.
I have been through 3 different cams in 3 different 6.0 setups. I tend to agree with L-eater. Havent seen any huge gains betwen the 3. I made 442rwhp with a stock 6.0, and now I'm at 461rwhp with the cam and some mild head work. What i'm curious to know is how accurate the correction factor is on a forced induction engine. The stock 6.0 was dynoed with 59 degree temps, and the heads,cam 6.0 was dynoed at 101 degree temps. I plan to take it back this winter just to see if there is any difference in the numbers then.