Seafoam is the only additive you will ever need to use. And if you use it you will never have any carbon or clogged injector related issues.
For those of you who don't think you need to or don't want to - you don't have any idea how bad the gas is now days. Why do you think they are having...
If you are not going to add the supercharger then go with the stage two. If you are going to add the supercharger later then go with the stage two suspension which comes on the 427R. 427s come with a stage two which has been modified in the front to carry the extra weight of the supercharger...
