The Mitsubishi Evo has a motor similar to the 4g63, but not the same, there more of a mirror of one another. Evo motors can hold a sizeable amount of more power compared to the 4g63, although 500 hp on a stock block is quite remarkable and they must have some damn good tuning (or they never get on it haha) I think the 4g63 motor will be good for 300-350whp stock bottom end, after that your going to start pushing it. All he has to worry about is transmission fitment etc, because all DSM cars were AWD or FWD.