How much HP?
#20
Id say around 283 rwhp. Add long tubes and around 300 to the ground. I believe the Zo6 cam is good for 17 to the ground. I have a 2003 5.3 with full bolt ons Long tubes, No cats ud pulley and I am putting down 285 to the ground. So you will definetly need long tubes with that cam. Hope that helps.