Does a 1970 Hemi Cuda count? I had a friend who bought one new and it ran great but was the most uncomfortable car I ever rode in, was very hot, hard to keep tuned, and rusted around the rear window which I understand was a trademark of the 70 Cudas. I believe the Hemi option was an extra $800 dollars and not many factory cars were sold with it as most got the 440 6 pack. Now one in good shape is worth a lot of money.
Ron