The Great Pumpkin - '71 Duster
Material thickness is only .032” minimum for aluminum. IIRC the sheet I got was .040”.
On the package tray there will be rails fastened down over the joints. I made a ”trim” piece for the front to cover any gaps and make it look more finished. I’ll post pics of it at some point.
I mentioned putting a rubber seal around the firewall where there are gaps. We’ll see how that works out, might be easier said than done.