[njcrossramjeffm]

Does any one know how the numbers stamped into passenger side tank of a curved neck radiator break down? Not the tin tag. The stamping on side of the radiator tank, facing the passenger side fender. Are there any difference's between a copo,ZL1 or the big block air car curved neck radiator. Lastly where do I find the most accurate core to recore on with. Thanks Jeff