What year did the Chevy 350 motor come out?

The Chevrolet small-block V8 engine, often referred to as the "350" (because of its 350 cubic inch displacement, a common variant), first appeared in 1967. While a 350 cubic inch version wasn't available at the very beginning of the small-block's run, it became a very popular and widely used displacement within that engine family starting in 1967.