Sorry man, took me a while to get back to this. I've been working on buttoning up a bunch of projects for the car...
Pictures are: Welds for firewall, Welds for rear quarter panel corner. Hoping they are enough to smooth over with bondo and give the paint a nice flat surface to bind to. Rear quarter was a pain when I ran into lead filler from an old repair. You can see the two black tack welds higher up from hitting that stuff. Gas masks on everyone!
Still pretty happy with my fabrication skills on the rear quarter so it would fit the new suspension and disk brake arrangement