My New project 1973 Challenger

The 8K could have been a last years left over. Not to many came that way. I wouldn’t call a tree shifter rare, just not so popular.
Would that have been a whole years leftover? They went to the 7 grand tach in 72, no? after looking at the pics again, that's a whole 70-71 cluster. The clock and odo resets are through the woodgrain, not through the speedo and tach lenses.