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My 1970 U-code Cuda is stamped HP2 and is original #'s motor(partial vin on motor). Car has a harmonic balancer that resembles a cast crank. All 440-4 and 440-6 used the heavy six pack rods and in turn used a externally balanced crank....

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Now wait a minute! I thought 70-71 only did the 440-4V HP use the same balancer as the 440+6. In 69, wasn't the 440+6 the only engine to use this configuaration? Did the Forged crank 440's in 72-74 use the same balancer?

I guess another wat to put it..."When did the 440-4 and 440+6 share the same rod/balancer part number?"

And finally...how can I identify a "Six-Pack" Rod?

Thanks

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