Small Journal 62-67 crankshaft casting numbers

oldcarguyga

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55 Chevy 210
I wish to advise you that your list of Chevy Smallblock V8 Crankshaft Casting Numbers SBC Two-Piece Rear Main Oil Seals lists 4577 as a forged steel crank. That is incorrect. 4577 is a cast iron crankshaft made of modular iron ( Nodular iron: in which the graphite is present as tiny nodules of characteristic structure). Folks are selling cast cranks (4577) as forged cranks on Ebay and claiming they are forged based on your incorrect listing.
Sincerely
 

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