Tarozzi said it came from the test pool. Cars used to test the production line and fitments. Not exactly sure how pilots fit in there. Cars were cut up or destroyed by end of model year. These cars might not have even had vins. These car would get cut up to do durability test. Tarozzi mentioned them cutting the window frame and cowl out of a test car to test windshield wipers for some 100K cycles. Other times cutting a door and door frames to open and close doors in a mechanized test rig some 100K cycles.
The cars got flushed out every year. No cars in the test pool you are not currently producing or going to produce is what Tarozzi said.
Heck by mid 1968 they are working to finish up 1969 model launch.
