Hey 46,
I just put 7 pictures of the area your discussing on the following link. All at tear down. Do not have anything of the brackets bolted on to with the surround but look close and you can see the rusted outline of one on the drivers side. Hope it helps.
http://www.flickr.com/photos/dodsonbrett/sets/72157627608401951/
Cavebull


cavebull
Stovebolts - so easy even a Cavebull can do it.
https://www.flickr.com/photos/dodsonbrett/collections