360 small block info

green1 said

Pull the pulley of the balancer- it will say external balance, if it is. I don't thing you have a 360 from that year.

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Only cast crank 340's had "USE WITH 340 CAST CRANK ONLY". 360's originally had a wider, heavier counterweight than a 340, but it was blank. Later 360's had weight taken out of the opposite side of the balancer/damper. Also had no message.