Broke out the parts, cut off tabs, and debured edges. Clecoed parts to the firewall. Match drilled parts to the SS firewal. Debur firewall and and subassembly match holes.
Cut a piece of MDF to fit the firewall. Clamped asembly to the table and bent in the 8 degree firewall forward bend.
Disassembled all parts and squeezed on the rivets for the interior angle pieces. Ready for dimpling.