More pictures can be found here: http://s116.photobucket.com/albums/o33/StanIROCZ/SFCs/
These were made by South Side Machine (SSM). They are no longer in business as far as I know. They fit tight up against the rocker pinch seam which makes tack welding simple. I think that is very important to get the best stiffness. Many people still prefer the SSM's over others.
Condition: These were welded in the car which means I had to cut them out. When cutting I errd on the side of cutting the SFC rather than my car. But after removing them I welded up the cuts and ground off the old welds. Visually they aren't perfect but they will still function like they were new.
SOLD!