Well, I was feeling like a big man, having all this progress and success so far. But wouldn't you know, I needed a humbling moment. And I sure got one.
pics aren't really capturing what is going on here too well. but I ended up chasing a flat spot in the cap contour and I ended up creating a flat spot in my new firewall upper profile. I didn't even notice it until I was cleaning up for the day and stood back to look at the whole feature as one.
This was probably exacerbated by me being worried about grinding too much original metal and favoring the new firewall. WHOOPS.
Now the passenger side upper profile of the firewall has a sag in it.
Compared to the dirver's side, which is much more uniform and subtle.
So I am not sure if I should try to fill it with something like USC's All Metla filler. OOOOOR I could try to adding material back to the profile with welding and perhaps that filler rod trick? I am worried about doing to much grinding and removing to much material and leaving everything thin.
I feel like I should walk away from this particular problem and come back to it later.