I've been into LS1/6 engines in a camaro and my vette but not sure if the 5.3 is worth trying to get some power from in my '00 GMC Sierra ext cab--What are the basic mods for the 5.3?I have an intake already,I got gibson headers,1.8 rockers-sitting in the garage.How would a ls6 cam work and I was thinking about the Crane tuner--since it comes with a few cam programs already.Does anyone know if that tuner can eliminate the torque management? What kind of power have you guys been getting to the wheels with the 5.3s'?