340 Stamped Ramchargers 7-30-74

moparbros said

How much older would you say. Also I have a 68 340 block and those stampings are not there. something they started later in time?

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Older is good. TRW forged in the USA. Today's equivalent is L2316F Speed Pro forged in India I think. Not sure when they started stamping letters. My 70 340 was stamped.