Some may disagree with me but the cam tech.lines 'usually' try to talk you down on cam size because they know that most people 'overcam' their motors.Then we bitch about the cam when the vehicle won't do what we want it to.But here's the thing that gets me,,,have you ever noticed how much hot rodding literature is written around street cam selection? From what I've seen,100% of it.Why,thats where the money is.I'll give you an example,say you have a sbc350 in a 3000lb vehicle.You want it to run low 13's.What cam can you find without coping another persons build? Now I am fully aware of the many variables that can be used in parts selection to get this! My point is that there is 'way' to much catering to street performance and if you want to build a (specific motor for a specific track performance) you better copy or have the experience to know what/how to build it! The whole hotrod world evolves around selling to street cars.