They overlap at the top, where the fenders would be bolted, but there's no additional metal between them. You have the shock tower with the front apron spot welded directly to the shock tower. Even in arid climates like California, where my '67 Shelby spent it's life, they tend to rust between them and you wind up with rot that forces complete or partial replacement of the front aprons. Perhaps it was repaired by a previous owner who went the cheap route and welded, or pop riveted sheet metal underneath and used filler, or welded the hole up, and ground it smooth.
-Keith