I have a 04 SS, I am having LS6 heads ported at TEA, they should flow like a stage 2.5 or 3 because of the 4.00'' bore. The compression should be around 10.8:1. I am looking at getting a 3600 stall from yank, the truck will have long tubes on it, with probably the stock truck manifold. I am not sure what cam to put in there so any input would be great, thanks