68-69 340 rods

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1968-1972 340 steel crank casting #2899496
1972-1974 340,360,318 cast crank casting #3418645
 
From what Ive seen the changeover appeared about 1970-71. But for 68-69 definately #2899496. I had #3418645 in a couple of 71 forged crank engines.
 
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