If they did do AWD on the Challenger I think it would make up for the weight if they used the 6.4L. But considering the Charger weighs a couple hundred pounds more then the Challenger I don't see it making such a big difference for the Charger. I like the idea but I don't think FCA is up for it. They would be making their middle weights(Scat Pack/SRT) too close to the heavy weigh(Hellcat), and they'd have to make the heavy weight better. Which in turn shuts out the Viper. They'd have to change their entire line of performance vehicles to make room for one. FCA is not going to do that with the death of V8's right around the corner! I don't think they will anyway but I've seen much, much crazier sh!t happen. So who knows?