Vintage pics. More extended Z stripes!

[Rick H]

Kurt,
Going with the most likely assumption that the extended stripes were added later could it be possible they were added at the factory after all? When painting the stripes at the factory how much longer would it take to extend them to the bottom of the tail panel?
It doesn't look like a whole lot of masking and taping was involved.
Was there a racing series or other automotive event happening back then that would prompt GM to offer this type of stripes on the cars?

I am just curious. I heard that the Carolina Blue car's extended stripes were factory added as well.

Just an interested observation with these cars.

Rick