Square hole:
Another patch panel courtesy of Hart_Rod:
I tack welded this piece in place from the top and the bottom, which is the reason there are a lot of spaces between the welds on top:
This picture does not show much detail, but I have added primer, seam sealer and paint:
It was time to tackle the area with the worst damage, which was on the passenger side. Introducing the famous Corvette option. Check out that blob of fiberglass to the right of the blower motor:
I don't like where this is going:
Oh my! What did I get myself in to?
Removing the firewall lip:
