Jeff,
It reads as the headers were part of the Z-28 option but came in the trunk to be installed by the dealer or owner. If you can get the spring 2003 issue of Muscle Car Review, it has Don Johnsons Nash Bridges Cuda on the cover, there is an article in this issue called "18 Days to Glory" which goes into detail about this Z, why it was built, and what options were installed before giving it to Pete Estes.
Motown
