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That said, it sounds to me like they might be weaker than the factory cast-iron cranks...
That would be my opinion from what I've seen... I would trust a factory 360 cast crank over an Eagle 4" Cast to be honest.... I think the factory crank will take more power. Again... just my  No one ever said I was right..... just opinionated LOL.
i think the heat cycles in a used factory cast crank may be of an advantage..
cheapst
365" Iron J heads,,3480lbs best 1.39 60ft on SS springs.10.54,124 mph ...6.67 1/8th et.average 60fts 1.46 w/ small cam &.063 no2 pill tagged & insured
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