Doug, here's what I started with.
Cab corners/or lack of!

You can use the link to follow through the process.(Not sure if they help)
I didn't use the whole panels,but only what was needed.
Especially the left one,thankfully i only needed a small section.

1950 Chevy Advance Design 3100 in Scotland
In the Stovebolt Gallery
More pix on Flickr.
I've definately got this truck thing in my blood ... my DNA sequence has torque settings
"Of all the small nations of this earth,perhaps only the ancient Greeks surpass the Scots in their contribution to mankind" Winston Churchill.