Do any of you guys know how these heads are assembled? Are they in two halves to allow for machining the water jacket features, and then bolted together with an O-ring seal or something like that?
Jay, they are a 2-piece, bolted together. If you look at the pictures in this link, you can see the dividing line about where a normal FE head stops. The attaching hardware can also be seen in one of the shots. I'm not sure about the sealing technique.
http://www.fordmuscleforums.com/all-ford-techboard/481127-billet-canted-valve-fe-head.htmlThose are Lositos heads I believe. The same ones Kuntz used in this build to make over 1100 horsepower.
https://www.youtube.com/watch?v=OF6yJscOp58&spfreload=10To Kuntzs' credit though, he has also built an FE making over 1000hp with cast heads in basically the same NA 2x4 configuration as the billet headed monster. Kuntz is definitely one of the masters of the FE world.
I don't believe the pictures in the Viser link are of the FE head. Just some generic shots of their products. The Losito heads use a somewhat traditional FE exhaust port flange. Still recognizable as an FE design, yet easily distinguished as being different.
Here is a twin-turbo engine being built some years ago that was posted on the other forum. Sadly, there was never an update done on the finished engine. My apologies if it's not kosher to post a link there, just done for reference sake....and to show one heck of an awesome FE build.
http://www.network54.com/Forum/74182/thread/1280423457/New+engine+pics+with+billet+heads