Thanks twisted!
The D extrusion as well as the runner tubing and the velocity stacks are from
http://www.rossmachineracing.com/ Custom manifolds are essentially what they do so it was a pretty big leg up on fabricating. Oh, I bought the fuel rail extrusion and end caps from them as well.
Zeke - that is an awesome link! I have never actually seen anyone do a double fuel system like my own - although I have to admit it's been a few years since I seriously looked. Pretty cool build.