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I have a set of these rods out of a 1973 340. My machinest says that he has seen and used thousands of these rods and it is not a concern.

It seems to be more common on the 340 rods from the factory, I have several extra 340 rod now,both early and late forgings, one is coated the others are not If you want some more cores PM me $10.00 each plus the actual shipping costs

Last edited by Cab_Burge; 11/17/13 02:46 PM.