Removed airbox side panel and used the top hole pattern to lay out a new side panel of .040 6061 T6 which matches the final profile. Repeated for opposite side. Fabricated an end for the airbox to improve airflow through the radiator. Bracket attached to cabin floor along the top edge with L angle and the ends rivet to the side panels of the airbox. Prepped, positioned, and riveted. I did remember to put threadlocker on the rear shafts of the radiator that pass through the cabin floor since they are now covered up.