Got some more .063 sheet and angle to make the missing parts on the firewall. Got the fuel pump reinforcement plate, some spacers, and the stiffener at the bottom of the cutout cut, match drilled and prepared for priming.
Drilling the fuel pump reinforcing plate to the firewall.
Firewall with all the stuff removed, ready for dimpling and reassembly.
Firewall aluminum parts being primed before reassembly.