Dodge 360 more HP.

Hey, I am boy from Norway (so perhaps it is something bad english) I have a 1996 Dart. I also have a Dodge 360 engine, which I would like to put in this car. But I wonder if people have some simple tricks to get more hp out of this engine. I would guess it's around 200-250 hp in it today. and where I can buy parts that are good and cheap, which is sent to Europe. I would like around 350-450 hp.

thanks for all the good answers
:cheers:
V.F