Hello everyone! Due to my mis-fotune, or good fortune depending on how you look at it, the heads from my stock lq4 are going to pay a visit to my local machine shop. The previous owner broke of some exhaust manifold bolts inside the heads when he changed the clutch.. The engine is my 2003 2500hd with the NV manual tranny. While the heads are off I'd like to see about upgrading my cam and getting more torque and power from the truck. I am also going to do an electric fan conversion on it, and a kn filter. The truck has a dual 3" exhaust from the cats back using dual flowmaster 40's. It does not have a H-pipe. A future upgrade will be long tubes and a H-pipe for thr exhaust, I will be leaving the stock cats in place. I am looking for suggestions on a good cam to use. I am toying with the idea of having some port and valve work done to the heads and possbily having them milled to bump the compression ratio a bit. Depending on cam specs and price I may leave the milling portion alone. I know that if the heads are milled a lot more work and parts (push rods) are involved with the cam. So what are your suggestions and do you have any power numbers to back them up?