Quote:
Originally Posted by 1971WARBIRD
in the early 60's there was a forged super duty rod used in some of the 421's. until the 73-74 SD rod came out, they were the go to if you could find any. there was a later run of them, but at this time cant remember exactly when it was. hopefully someone with knowledge will chime in.
better ad that there were other forged rods, but these were heat treated and stronger than those known as rubber rods.
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Yeah, it's probably the 421 rod they are referring to...