The 70 396 Camaro was ACTUALLY a 402 from the factory.
It was a .030 396 Block from the factory.
The still called it a 396 because of the name recognition
of the SS396 Moniker.
So also was the 1971 SS396 Cars and also the SS396 Chevelle
and El Caminos in those years = really all 402 CID,
I already owned a Car Dealership in those days and still remember
quite a lot from those days.