Okay, so right now I'm debating between the 5.7 or 6.4 liter and whether or not to keep it NA and just make a few simple mods (E85, meth injection), or going the supercharger or turbo route. So I'm looking for honest feedback from folks that have done any of the above. What are some of the praises and criticisms of adding boost to your car? And do you regret doing any of it? Also, please comment if using "eco mode" still works if you have a supercharger or turbo. Thanks!