Depends which A&A setup you have since they make different ones. If you have MW ports then you want the 270 heads. If you have the standard port version that they make then you want the 240 heads. Take a look at your intake manifold and/or post a picture of it here so people can tell you what you have. If y our intake has a valley plate built in then that is one thing. If it doesn't have a built in valley plate then you can use a billet one.