A new firewall would have been better, but I'm going to try to weld the huge piece someone hacked out of this one. The panel gap is too wide to butt weld, so I'm using 1/8in tig rod as a filler. Taking short pieces bent to follow the contours, and tacking in place at this stage. I think it will work. A couple sections are too wide that will need a small piece of sheet metal. It will blend right in with all the other hack repairs done 40 years ago.IMG_0229.jpgIMG_0231.jpgIMG_0233.jpg