Mater,

Even if you do this right, you never know how the trucks might be used over the next 50-70 years. I can imagine how someone restoring your truck 70 years from now will be posting the following on whatever medium is then used for sharing old GM truck information and asking restoration question:

"2079: I am sure that my truck is original and it does not have those holes at the top of the door openings. If you truck has them, someone must have drilled them there for some oddball reason."

How many times have we heard how someone is certain that what they have is original, and it really is not.

Tim