Interesting. My first Camaro was a 6 Cylinder (250) with a 4 speed trans.
I do not know the VIN number or buld date; sold it in 1982.
However I have pictures of it and confirmed it has the Z23 option, along with 727 Interior.
It had the "pebble grain" steering wheel.
Here's a picture of the interior with the pedal trim, wood on the wheel and part of the dash along with the grab bar and ad blown-up pic of the steering wheel, clearly showing the pebble grains: