Great story, Dave! Now, somewhere in Wisconsin there's a guy going round saying, "Don't mess with those Camaro owners! I saw one the other day trying to pass a State Patrol car!"
But you actually raise another --perhaps better-- question. Straight from the factory in 67, 68 or 69, with everything set right for street use (tires speed balanced, etc), what would have been the "best" highway crusing speed for an SS or a Z. (Got a feeling they would be different). I've never heard anyone say... Does anyone know?