the motor will fail. I have a friend in Huntsville (where Hinson Supercars is located) who has an FD LS1 who has over 600rwhp, the car maintains its 50/50 weight ratio, and it actually shaved off a few pounds, weighing in at almost exactly 2800 lbs after the swap. The car is almost untouchable on the street. Do the swap, you won't regret it.