EFI Bung in head update

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Your driver's side body is looking like my C-body, which has the UCA bushing ends exposed in the engine bay, with curved bolt-on inner fenders around the UCA. You might look at one of those for ideas how to replace the supports and sheet metal. I think a triangular top brace from the side to the shock support would be sufficient structure...
can you elaborate> Where is the triangle coming from? I plan to run J bars from the firewall to the base of the radiator support on the frame and then tie in the shock mount tops to those.