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  1. Andy D

    Stamped steel rockers.

    I have a 68 GTX 440. I just removed the valve covers for the first time and noticed the rockers have a stamp on them of either +32 or +34 is this done by the builder or the factory? I have two on the left bank at +32 and 6 at +34. The stamp is on the interior of the cup opposite the push rod...
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