A few changes since the last post.
Created a duct to connect the mouth in the front bumper to the hole in the slam panel.
It's welded aluminum attached to the same mounting holes as the inner duct work that makes the box for the radiator.
These pictures only show it tac'd up, but it was seem welded.
This is it final fitted.
And how it looks with the carbon wrap. I backlit it with a flashlight for effect.
I also added AC. The lines aren't connected yet, but all the heavy lifting is done and the car is back on the ground and running again.