68 Barracuda trunk/quarter panel transplant?

Most of the parts you mentioned are available from AMD. They are new stampings made from new tooling. Because the aftermarket has to create new stamping dies from scratch, the parts are not 100% accurate but they are better than nothing. I'm happy to have them available.

These cars are nothing more than a pile of individual stampings that were originally spot welded together. If you look carefully. You can find the spot welds and drill them out one at a time. For instance the front floor joints are at the firewall where your feet rest, and along the top of the rocker panel. You have to remove the carpet, door sill moldings, and the wireways to see the welds Then you prep the mating areas and weld the new tin in.

I replaced the entire front clip on my 69 cuda including the frame rails and floor and it turned out well. I have no business doing this kind of stuff but I'm methodical and take time to figure things out. I think I counted over 300 spot welds and using a Blair spot weld cutter all were drilled out. Its going to have to wait to be finished since I've since acquired another 68 cuda and a 64 Val since then. I call it my retirement project.