I've made it my goal to be able to purchase a pre-owned Challenger R/T Plus (2015-2018) by the end of this year or the beginning of next year. I was originally going to go for a Scat Pack, but at 21 years old the insurance premiums would be murder, and the gas mileage would likely be worse (in town) than my current 2001 Durango 4.7L. Not to mention potential repair costs. All that being said, I want to know what power adders I can get for the car, since I do want more than 375 horsepower (just can't afford it from the factory). I'm looking for best bang for buck. Although, I'm thinking hard about an Arrington 392 stroker kit. How much would I be looking at in labor costs to have that done for me by a competent engine builder? How will it affect overall longevity of the motor? Also, what's the max size tire I could fit on to a 9" wheel? And would it be in my interest to get bigger brakes? Are they made by Dodge or Brembo on the R/T Plus? I was thinking of a camshaft upgrade also, but I like the sound of the idle as it is, not crazy about the lobey sound that comes from a lot of aftermarket performance cams. What cam grind will give me increased performance and an enhanced sound without too much of the lobe and without sacrificing too much gas mileage?