So, this summer, i'm bumping up from bolt on engine parts, to internal engine parts, and performance mods. I'm looking at doing a cam shaft, and roller rockers, springs, lifters, and some bolt on parts, long tube headers, gear my differentials to 4.10 or 4.56, and a custom tune'd computer, for all the modifications. I just have a few questions, i do a bit of highway driving, i do around 60km or more of highway when i go somewhere with my truck. So i can't have that crazy of a cam to make my truck rev at 3000rpm going 100(60mph) down the highway, i still need room to gear my dif, neither i, or my old man can remember what measurements are which for cams, basically what i'm looking for is to get the most bang for the buck, and then get roller rockers and springs and lifters to match the cam to get the best performance out of everything. What would you recommend for a cam?