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1967, 440 Engine Crank

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Forged cranks tend to have more rounded counterweights and the “seam” where the halves meet will be thick, usually 1/2” or so. Can usually see the grain of the metal.
 
Tink it with a wrench.. More of a thud sound is cast and a ring is forged.



 
1967 440 should have a forged crankshaft. The parting line on a forged crankshaft is wider than a cast crankshaft. You can also give it the ring test. 440'
 
Check this one out. It's the one I pulled out of a '78 RV 440, that had never been apart. "E" stamp on the pad, like it should....kinda looks like a mix of both haha. Lots of balance holes, yet had the typical cast crank balancer with the big weight on it. LY rods too, not 6-packers.
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Yeah...more proof that you never know the weirdness that the factory put out. Engine had the cast crank stamp, but yes I believed it to be a forged as well. The pad was also stamped for a .010 undersized crank, which it is. All factory internals were still intact as concluded by the autopsy...
 
The "tuning fork" test is good for both checking if your steel crank is used up or if the crank is cast. The cast cranks all have the thin part line on the counter weights. The tuning fork test does give you a good idea if a steel crank has started to show cracks. If you stand the steel crank upright and tap each counter weight with a hammer, it should ring like a tuning fork, if the ring dies out quickly, it's started to have cracks. Cast cranks don't ring.
 
Check this one out. It's the one I pulled out of a '78 RV 440, that had never been apart. "E" stamp on the pad, like it should....kinda looks like a mix of both haha. Lots of balance holes, yet had the typical cast crank balancer with the big weight on it. LY rods too, not 6-packers.
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That is a forged crank. If it had a cast crank damper on it and it was factory then someone balanced a forged crank to work with a cast crank damper. They typically didn't do that kind of stuff but maybe it is the end of the month and the boss was screaming about meeting quota or something so the guys in the shop built a Frankenstein motor out of the parts sitting around.
 
Theres some stock/super stock guy out there wishing he had that lol
 
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