327 engine available in caprice 1965?

No, a 327 cubic inch engine was not available in a 1965 Chevrolet Caprice. The Caprice was introduced in 1965, and its smallest engine option that year was the 283 cubic inch small-block V8. Larger V8s were available as options, but not a 327. The 327 was phased out of the Chevrolet lineup in favor of the 350 small-block around that time.