Tonight I drilled the stiffeners, gussets, brackets, and spacers to the firewall. The the edge distances look good on the heavy F-601J angles. I still need to match drill the recess box. I also need to find or fabricate the F-601TD brake line pass-through plate.
Left F-601J drilled into place.
Left F-601P drilled into place.
Drilling complete except for recess box and brake pass-through plate.