If I may ask, What is your cam number and do you have a 6.0 in your truck? Reason I ask is putting a performance cam in a 5.3 and trying to use the same cam in a 6.0 will yield different results.
Kev
Yes it probably will yield different results but you can do what I did and contact Comp Cams and see what they recommend.
The cam is Comp Cams LSR .607/.614 219/227 112LSA 54-456-11 is the SKU with that I had to run the dual valve springs.