The casting date marks on my 1957 &1959 Canadian blocks (235 and 261)are located behind the intake and exhaust manifolds. They must be removed to see. The 'casting codes" are found just behind the starter.


1954 Chevy 1300 engine 235 (1959)
1955 (first series) Chevy 3100 engine 261 (1957)
1927 (other brand) Model T- engine 327 (1968)