Sadly it may replace the R/Ts 5.7L(hope I'm wrong), but I doubt it'd replace the new 392..
I'd be surprised if there was much improvement with a twin turbo V6 over the 5.7 V8, but... I could be wrong.Just speculating...With gas prices getting higher every week, I would think that Dodge and Fiat would look to produce a performance engine that didn't stop at every gas station.