Earliest LS6/M22 production date?

[1972convss454]

The earliest built LS6 to date came from the Leeds plant and was sold in Canada. It is fully documented and was built in late November. You have always heard they didn't start production on the LS6 until they stop production on the L78. I actually have a build sheet from the Leeds plant for an L78 that was built after the Leeds LS6.
Still interesting that these two early built LS6's were both sent to Canada.
The green "Pilot Car" was built at the Baltimore Plant in early December. IIRC