As mentioned in a previous post, I’m going to carry my track tires where the back seat normally goes. Pulling the rear seat leaves a big pass through opening to the trunk. I’ve got the battery back there and will soon add a rear-end catch-can/breather tank. So, I needed to create a block off plate. Used .025 aluminum sheet. I didn’t have one piece that was big enough so I created two halves and still needed a center panel to get the width I needed. Picture below shows it being held in place temporarily with clecos. I’ll pull it back out, run a bead of body seam sealer around the perimeter and then rivet it in place.