I worked in the Kenosha, WI A M C engine plant as a machine maintenance man from 1957 to 1989 and the V 8 engines built there were, Type one. 250,289,and 327 Cubic inch. Type two style one 290, 343, and 390 Cubic inch. Type two style two. 301, 360, and 401. The block below the exhaust manafold on BOTH sides has the Cubic inch size cast into it on ALL the Type two engines. Iron wolf