360 motor build

I am new to the classic car scene. I have a '70 Dart that I am currently playing with. It has a 360 in it that runs well... I have the chance to buy a 360 for a fair price, I am wondering what components I should use in the motor to get it to around 400hp. I don't have tons of money, and I know I may have to bore it over which is fine... Any help on this would be awesome!! thanks.