I'll be curious to know what you find, Kevin. I've bought and studied lots of this stuff and I haven't found anyone who has gotten it right yet. Some time back I even asked a fellow (dead now, sadly) who ran a body shop here specializing in restoration work. He said I should do what he does and just consider this to be pretty trim work because all of it is being made by people who are more concerned with appearance than functionality and have little idea what they're making will be used for. And some of the mistakes are absolutely comical. Case in point...Below the first image shows the 9 lines running along the OEM stuff. Most of it has no lines, but the best I've found has 5 lines. How much more work would it have taken to cut 4 more lines into the extrusion die? Another 10 minutes? Maybe.
~ Jon 1952 1/2 ton with 1959 235 | T5 with 3.07 rear end