While waiting for the headliner to stretch I pulled out the dash and vacuumed out the body shop dust out of everything. There was a ton of dust and crud in the lower footwells and inside the dash ductwork. Glad I got all the garbage out now instead of the first time I turned on the A/C.
The second gen Firebirds use a giant one piece dash. It's not a dash pad, per se, it's an entire housing for everything. That is why these things are so hard to find and so damn expensive when you locate one. They don't age well and most of them have the radio mounting area gouged out. Mine has been "trimmed" by a previous owner but the factory AM/FM face plate holds the front of the radio in fine. Other than that, the pad is mint.
Here's the pad during the hose down:
