Even if you could physically make them fit, it would dramatically alter the car's handling and potentially damage other components. You'd need to consider extreme modifications like extensive fender rolling or flaring, potentially changing suspension components, and possibly even custom-fabricated parts. The expense and difficulty of such modifications would far outweigh the benefits.
Stick to wheel sizes recommended by Dodge for the 2008 Charger RT. You can find this information in your owner's manual or online resources dedicated to Dodge Charger specifications.
