That's going to be interesting, here is a vid of me racing an R/T fully modded (headers, intake, full exhaust, and tune) He said he was making 350 ish to the wheels. I was at the time FBO, so I had an intercooler, running procede V5. As you can see I beat him, but with your heavier weight (I'm not XI plus I have FRP trunk and MORR VS7s which are ~8 lbs a corner lighter over stock) and lack of intercooler paired with his higher horsepower, it should be interesting.