327 original?

  1. 1966 El Camino 327 ID

    Tag Team
    Trying to determine if engine block is original. Can find two numbers; 1) Block Casting Number is GM 3857174 2) Date Code "J15" (there should be another digit for year?) The VIN is not on the extension of the block's deck surface on the passenger side. What's up with that? We pulled it out...