New Dutra Duals

there is a photo of a set of the new OZ Dutra Duals in this really neat car post

http://www.slantsix.org/forum/viewtopic.php?f=30&t=64612&hilit=dutra+duals

previously there was one kind of Dutra and it was used on the front or rear. When used in the rear it made for a really tight bend to get over even a mini starter.
It can be done as I did that on my 83 D150. I am thinking that when Doc designed these he never intended it to be fit to the rear as the plan was to mod the existing slant six exhaust manifold for the rear unit.

It looks like AussieSpeed did address that.

Concerning interferience to the block, I did have to grind the rear manufacturing lug on the block, but again that was on one of Doc's original design parts. And it was not much to resolve.