I know of 5 from Lynch Rd. that are 912 or earlier, it is the earliest I know of from St. Louis. It was on MOPARTS ~5 years ago.

The S.O.#s are almost random due to the number of sources for new car orders. Yes, '68 tags code "EXPORT".

WAG they had to be around 3,000 Road Runners & 50+ HEMI Road Runners by mid-September '67.