> Trivia time: we all know Z06 is the special performance minded Corvette.
> Any one remember where did the designation "Z06" came from?

I can only guess it's the part number for some upgraded component, like
Z51 for the standard Vette. Maybe the suspension on an older model?

I've never understood GM's part numbering scheme, WS6 for a F-Body
car (Trans-Am), Z06 for a Y-Body (Corvette).