Don't have the casting number and date code for the heads handy Builder. Do know for a fact that the engine was untouched when I purchased the truck which is a 1959 with offset bolt pattern heads and rams horn manifolds.
Bruce Old Toy: Ol' Betsy stock 59 Apache SB Stepside (Gone but not Forgotten) New Toy: 1962 Impala SS Coupe The Driver: 1990 Toyota truck