It's illegal, but we have a flat 6 mile 4 lane highway not a mile from me. I take the coronet and drive east to check it out and run back like i stole it. My 5.7 is around 425 hp with 323's and a 5 speed automatic trans. 17 hundred rpms at 70. I shut it down at 140. I know it will do 160, but I don't have the balls to do more on the street. I can't remember, I have a friend who does that standing mile, I think that's what they call it. I can't remember where it is. He has a challenger R/T, nothing like yours. That thing you have is a rocket. Congrats on your new space shuttle....LOL