which ones are the best to get i know there are a few different types i have to take my stocks off so i figured to get the gt40s any one know difference in them and the best place to find them thankx
Well the gt40p heads are my choice the only draw back is you need gt40p specific headers or any long tube header will work (BBK/Mac). The gt40 cobra heads a good heads and better than stock heads and you can reuse you stock headers. You can find them cheap on ebay or corral classifieds.
The GT-40 irons were the factory heads for the 5.0 liter cobras. They can be found for extremely cheap. The GT-40P's were factory heads for the 5.0 liter explorer engines. They flow better than regular GT-40 irons, but can not be CNC'd as much. These are the heads I run on my engine, which makes around 300rwhp. The GT-40 Y heads are aluminum castings and flow well, but are more expensive than either of the irons. Look around in the classified ads for a good set of any variation. Recently, I have noticed ads in muscle mustangs that advertize the Y heads for very cheap. Hunt around.