Well, I've been in the CR trucks since 03 and I think it would be safe to say that I'm way behind on the 12 valves. I just bought one and wanna learn some new things and play with it a little. The truck is stock now, but I wanna do as much as I can to the pump without taking it off, like dv's, gsk, fuel plate and maybe work on the afc. What can you do to the afc? I really appreciate your help. I really look forward to learning some new things on these old engines.