Well I couldn't afford turbo adapter fitting so a buddy of mine ended up fabricating one. He used a piece of metal plate and then welded the plug on the top with a hole tapped in it already. Then he used a drill to make the holes for the screws.

I used a dremel to cut the sides and sanded the edges. Then the product was done.

Enjoy:

 

I fabricated one a couple days ago using a 1/2 inch aluminum plate. I didnt weld it like that. Instead, I tapped the thread to screw in a 1/8 npt.

 

hahah i shoulda did that. i'm blocking one screw on my manifold cuz the oil feed line is blocking the way on the thread of the head.

 

Hope it doesn't leak. The flange looks pretty thin.