400 Rebuild in process

I'm only 21 and i need your help dont let this young classic car builder fall between the cracks. I'm rebuilding The 400 block that came out of my 68 bonneville. I want it to push about 400 Hp. I'm great with the tear down and rebuild but i'm having trouble selecting the go fast goodies for my toy. I want to replace the whole 9 yards (cam, valve train, heads, pistions) Can any one point me in the right direction or send me to a web site that can help.