[Chevelle-list] Braces (ref ebay Item number: 260085853888)

[Denny Shewmake]

The second picture for this item on ebay shows braces from the core support 
to the fenders on a '71.

http://cgi.ebay.com/ebaymotors/1970-1971-1972-Chevelle-Aluminum-ball-mill-SHOW-PANEL_W0QQitemZ260085853888QQihZ016QQcategoryZ46098QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
Are these braces factory or aftermarket items?   Big block stuff?   I have 
never seen them before.

Thanks, Denny

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