Picture of actual trunk floor w red line showing you as a reference what the drawings will be. This is how I did my 67. Its all ground down, so an actual picture of it will not help. Pic #2 is a cut section of what you have. Pic #3 shows a flat sheet that has a joggle or flange where it meets the trunk floor. In this spot you can rosette weld it in position at the holes where you drilled out the spot welds. At the forward position, you only cut through the transition pan going straight across, do NOT cut the crossmember. This leaves a small ledge to allow your new patch panel to sit flush with the transition pan. So when you do weld it all together and grind it down, nobody will ever know it was patched. I used 19 gage or .043" steel sheet.
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