what were the years that corvettes had the big block motors
just Google ‘Corvette wiki’, read all about it.
Every year the the 396,427 and 454 were offered.
396 1965-1972
427 1966-1969
454 1970-1974
I may be mistaken, memory a bit fuzzy this many years later.
Thats right!!! 
Thanks, I want to know corvettes too. I found there a lot of infos about Corvettes.