Thread: WANTED: Oldsmobile 403 crank for 1979 Trans Am
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Old 02-17-2026, 02:07 PM
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74SDformula 74SDformula is offline
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I believe the 350 and 403 share the same casting number crankshaft. However, they are balanced differently. From what I remember there is a visual identifier on the 403 crankshaft.

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