1971 factory 318

rumblefish360 said

There all steel! LOL It is a forged crank. Mill hour heads down for cheap compression.

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I totally doubt this has a forged crank, likely a 1 in 10 chance. My car's original, never been apart other than the oil pan 1970 318 has a cast crank. They started making them with cast cranks in 68 or 69.