While I had it mocked up I took some generic measurements to enable a base design for the turbo manifold. I tack welded the input flange for the turbine to a set distance from the exhaust flange which allowed me to fully render and figure out the manifold prior to actually fabbing any part of the manifold together. This is the result:

http://i123.photobucket.com/albums/o...ManifoldV1.jpg

As you can see it's a very compact unit.
http://i123.photobucket.com/albums/o...anifoldV15.jpg

This also led to issues when constructing it. (always make sure to check and double check when you're fabricating something). During fab I came to the sudden realization that the waste gate path would interfere with the lower intake manifold. This is what the process took:

http://i123.photobucket.com/albums/o...415092225a.jpg
http://i123.photobucket.com/albums/o...0415092247.jpg
A test fitting:
http://i123.photobucket.com/albums/o...0415092014.jpg
http://i123.photobucket.com/albums/o...415092014a.jpg
This is when it became apparent that the waste gate could not be mounted where the digital manifold dictated:
http://i123.photobucket.com/albums/o...415092026a.jpg

http://i123.photobucket.com/albums/o...0416090620.jpg
http://i123.photobucket.com/albums/o...416090620a.jpg

Updates far and inbetween
 

So by now you have a majority of the manifold constructed (and I emphasize a majority), you should realize that you need to know how the turbo needs to sit and what room you have left. So throw on some of the intake and check your clearances, like so:
http://i123.photobucket.com/albums/o...0416091200.jpg
http://i123.photobucket.com/albums/o...0416091402.jpg
Notice that it's a tight and snug fit, and depending on where you mount your turbo you may have more or less (more with a smaller turbo, less... and probably having to cut into the sheet metal to mount the nice big turbo you have).
You'll also need to figure out how to work out the cooling to the turbo. You can do it one of two ways:
http://i123.photobucket.com/albums/o...o/Parallel.jpg
http://i123.photobucket.com/albums/o...rbo/Series.jpg
There are kits that can easily do this for you. So shop are around or figure out how you want to do it. But to make it easier do it the way as the first picture shows. The second one will not work.... So don't do it.