[SS427]

Great topic as there are possibly a lot of neat parts out there.

The only thing I can offer are photos of a customer's 1970 Pilot Chevelle interior. It was the 42nd car built on the pilot line and had vinyl wrapped over metal rear seat arm rests compared to the assembly line plastic ones. They had the part numbers written in marker on the back of them. These prototype panels are part number 8799609 compared to 9806311 for the assembly line plastic one. This car is full of unique parts and markings, most of which are marked with "PILOT" on them in yellow tape. The front door inner frames and the trunk lid are different than assembly line pieces.