Heres the latest. A belated thank you to Cosgig for getting me the wiper motor reinforcement assembly off a "truk lagoon" rusty 69 barracuda he was scrapping. It even came with hardware that I cleaned up. I removed it from the chunk of sheetmetal it came with and sandblasted it, then epoxy primered it with old aircraft primer. I removed our old one that looks like Ricky Racer took bolt cutters to, then pop riveted a plate over the hole. It's just test fit right now since I need to clean up the metal on the other side, and primer both mating surfaces with weld thru primer, and do a little firewall massaging of small dents nearby. If changing out the firewall wasnt such a ***** I would just be installing a new one.