Applied epoxy and fiberglass to left rear of plenum to create a new back wall of plenum to replace the baffle oil cooler brace since I'm mounting my oil cooler to the firewall. Opened up the transit duct inlet to align with the injector servo inlet. This created avoid in the inner wall of the transit duct that had to be repaired with fiberglass and epoxy. Used a aerosol can that had the exact size diameter to act as a mold for the fiberglass. Primed a couple parts of the alternate air door on the Sam James FAB. Also firmed up the location of the oil cooler on the firewall. Should be able to use an existing hole for an adel clamp and some rivet holes for attaching the oil cooler mounts.