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Old Jan 1, 2012 | 03:09 PM
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Default ID this differential...
Code stamed on the bottom: FA 3 29 66

I will assume its from a 66 car.
What does the FA mean?

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Old Jan 1, 2012 | 03:16 PM
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I believe that's a 3:70. Dennis
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Old Jan 1, 2012 | 03:20 PM
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"FA" was a 3.70 Posi with big-block output yokes (bolted caps for the inner U-joints instead of U-bolts).
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