mustangman38

Im a new at this site. I have a question for you experienced guys. I have a 2000 mustang that I am completly tearing apart to the frame and rebuilding. It came with a V6, but Im putting in a V8. I already have torn it mostly apart. The engine is out, along with the clutch, transmission, and all the interior. What kind of technical stuff do I have to do for the conversion though? I know I have to replace the computer, and probably the wiring harness too. I know I need a new pcm and the other computing thing next to it (I dont remember its name). You guys who have done this before, cmon and help me out...
Thanks