Forgive my ignorance on cam swapping, but is this a drop in replacement? I was actually going to post the question over in the performance section of "how to make a 2005 a VVT Titan". I know the intake manifold changed as did the exhaust, but it seems most think the HP increase came from the VVT change. Is it simple to make an 05 to 07 capabilities? Again, excuse my lack of knowledge on this.