Yeah I agree, it is possible, and probably not extremely difficult with a t3/t04 and internal wastegate. I am just considering my options at this point, and my grandfather and a friend of his are really good at fabricating, machining and welding things (my grandfather works on classic cars as a hobby and has a '21 hudson and a couple other cars that are damn near impossible to buy parts for these days), I was going to try to weasel their aide in creating this part, because that would be where I have the difficulty. I also will employ his help for the exhaust piping and downpipe.
Helix112: now you're increasing my costs quite a bit. However UNFORTUNATELY!!!!!!! (i.e. you suck man! lol just kidding) You made a good point. I should use a BB style turbo, looking at the Garrett GT35/40R and GT42R, they both look like amazing turbos, except for the drastic price increase....
As far as the part though, the difference would just be the flange I put onto the spacer, I'd leave the exhaust manifold stock, but due do the price increase the Helix just gave me, some how I think I'll probably stick with the GT35R, but with the external wastegate design I have been thinking about from the above post.