No secrets OEM, just searching like you. That C30 while I believe the miles are correct is not near as nice as your 66. The owner passed away and it was sold to a used car dealer. So the story is sketchy on why the low miles.It was bought new for a John Deere dealership in New York ( its dark green with yellow lettering). Only story I got was he liked it so much he never drove it ? Doesn't make sense, but.... Still has all six original tires with the nubs on them, along with many details of originality. Paint is fare but should come back, owner had his name and phone number painted on the doors, sold the business and brush painted over the lettering. The pictures of it in Photobucket are what he sent me 2 years ago when I bought it. I still haven't touched it. It just sits but I do need to fix the brake wheel cylinders to be able to drive it. My Son is going to college so it may get sold.