On an 09 or 10 they bolt right in if you use the 5.7s original intake, The confuser will run it just fine, a tune makes it even more better. With the SRT 6.4 intake you might have to extend a few wires but thats about it. The 08 and older does not have wiring or confuser control for the VVT so you will need to lock it down, let it go on it's own(supposedly just retards cam timing a little as RPM goes up and that may or may not be a good thing) or add the wiring and get a confuser that knows how to control it, then you will need a scanner that can wright the cars VIN in the computer, I use an autel scanner for that.