I found a rot spot on my 1979 camaro after thoroughly going over it. I took out the vent louvers in the door jams. Then I stuck my arm down in to the inside of the quarter panel and I pressed on the back of the door jam (where the door striker is bolted on, except down near the bottom). This piece is rotted out, but it doesn't come through the front (theres two panels). Is this number 34 on this page http://www.nastyz28.com/tech/e-78smetal.html
or is this the quarter panel? To me, it seems like the reinforcement panel goes behind the quarter panel, not in front like the image is showing. What are my options for repairing this? Also is this part available? I can't seem to find it. It's a bummer that I have to cut perfectly good quarter panels to fix this.