Hey REDPNY!
Do you have a Marti report!
Isn't this enough to prove your car is a GT, and if so on the Marti report is at the lower left of the report a list of additions fitted at the time of the build. Mine was pretty average.
I found my Marti report very handy and well worth it as my car has gone through a restomod and obviously not the same as the original car.
Fondly found that the car was originally Wimbledon white and Aqua vinyl interior, where I thought the exterior was Tahoe Turquoise, it is now Oxford white with black trim.
The car was sold by Galpin Ford in what was known as Sepulveda, Los Angeles, California on 26th January 1968! (Australia day)
Sepulveda is now known as North Hills! (An interesting read about Galpin and Sepulveda).
I've been all throughout the car top to tail, but not looking for a build sheet, I'm soon to take the back seats out again for another job, I'll have a good look then for one, the carpet has been replaced with black carpet so fair chance it would have been found by a previous owner!
Hope you find what you want!
Cheers Phil.