In the past I have seen an extension advertised for the right inner fender by the vendors. I'm not finding it anymore. GROUND UP doesn't have it in their catalog.
This extension is the piece located under the battery that is spot welded to the inner fender. These quite frequently are badly rusted, but can be repaired simply by drilling out the spot welds and welding on a replacement extension.
Does anyone know who sells these extensions?

I got one from year one a while back for my 69.

Tom I think I have one, the peice that is under the passenger side battery??
I have one of those.

Tom, I hope this is the part you wanted because its what I just sent to you, LOL http://www.chevythunder.net/chevythunder/images/smilies/roflblack1kz.gifhttp://www.chevythunder.net/chevythunder/images/smilies/roflblack1kz.gif Wow the best part is Made In the USA that has to be the first in a while..:yes:

http://img70.imageshack.us/img70/7454/p1010002zv1.th.jpg (http://img70.imageshack.us/my.php?image=p1010002zv1.jpg)

http://img235.imageshack.us/img235/822/p1010003zg6.th.jpg (http://img235.imageshack.us/my.php?image=p1010003zg6.jpg)