Question for members that were of age in '70

The big blocks didn't really become that way for another couple of years after 70 that I remember.
I was a whole 3 years old in 70, but my dad's and my older brothers buddies had cars of about that vintage around then and shortly after. I can say I remember working on later 70s big blocks and didn't think they were all that great, this being in the late 80s.