Well, I don't know what happened to my first post about this; it just disappeared, but here goes again:
Nobody in the aftermarket makes the item I'm about to suggest. I think it would be an easy-to-manufacture part that might sell a few.
Here's the deal:
The stock exhaust manifold for slant 6's has always been prone to cracking. Weld on it, and the chances that it might crack are increased.
To add a turbo to a slant 6, you can either build a header (not really necessary, except for racing applications) OR attach a turbo to the stock exhaust manifold. There is a method that is easy, and doesn't require any welding on the manifold.
Just get a small, short-radius piece of L-shaped 2.5"-diameter exhaust tubing and weld a flange that will bolt to the exhaust manifold exit on one end, and weld a turbo mounting flange on the other end, and you have solved two problems at once; mounting the turbo without welding on the manifold, and correctly orienting the scroll at the same time.
I would pay $75.00 for such a piece, and I'm of the opinion that there are several others who would, too. A stainless steel version could be sold for a little more.
Just my 2-cents....
