Oh what a day...
Here’s what I did in my Duster. Had I cut it out with a jig saw of band saw, I think I could’ve done a better job but I had a local shop cut it out with a plasma cutter. Shoulda have it CNC’d I guess. It’s 1/8 or 3/16” aluminum. Held in place by the studs on the MC and the steering column bolts.
This is the side that goes against the firewall.