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Old 01-25-2013, 07:51 AM's Avatar is offline
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Look at the crank from the front end. You will see a "parting line" that runs up the front of the crankpin. If this line is 1/16-1/8" wide. The crank is cast. If the line is 3/8" or wider, the crank is forged steel.

Cast cranks last hundreds of thousands of miles in production engines. Unless you are building a 600 horse engine. Cast is fine.
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