Brainstorming Ideas for 400-450 hp 360 Build

So you want something that you can tear around on the street for fun and drag race and autocross? My recommendation has more to do with you than the 360. If you REALLY plan on doing all those things with it, my one suggestion would be build it with some room to grow. Forged bottom end and the best flowing head you can afford. I think the torque of a 408 might be helpful in autocross, but no real experience in it.