GM shows a 1970 SS Chevelle with a 6-banger?

[Mr70]

They also used this same Chevelle on the front & back cover of the 1970 Chevelle brochure.It may look like a BB Super Sport,but behind the scenes photos I have clearly show it wasn't.It even has the early 1969 Chevelle SS rolled Ex. tips on it.
They actually made a commercial with this Chevelle too,that never aired.
I was lucky to obtain it and from all the angles they show,it's clear to see it was an early mock up crudely put together and no wonder it never aired.
They later released a much more professional commercial using a Real Gold 70 Super Sport and the actor James Hampton,who played "caretaker" in the 1974 movie "Longest Yard".