I ended up ordering a new windshield from Pilkington Glass with the same date code as my original which got a rock bullseye that was not fixable. My collector car policy through MK Insurance via this site covers it without a deductible.
Before the windshield arrived, I had the old one removed so I could do the inevitable repair/paint work in the lower corners that every second gen Camaro and Firebird requires. The areas in both lower corners are always corroded from the low spot where water can collect with no way to escape. Sometimes there are big holes rusted through on what appears to be an otherwise rust-free car.
If you are looking at a second gen F-body, always look at the lower front edges of the windshield. If you can see crud and corrosion above the window/dash line, the car is already in bad shape there.
To my utter astonishment, once the orginal glass was removed, the surface was absolutely perfect. Even the original butyl sealer was still pliable. The glass guy confirmed that the windshield had never been out prior to this week's removal.
Here's a shot of the original backwards date code on the passenger side. What I thought was corrosion in the corner was just dirt collecting there.
And once the windshield was out, I did reshoot the dash and mounting areas since the removal process nicked up a couple spots. So, here it is after a quick misting with flat black from a foot away, to maintain the grainy texture:
