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FA code L68 69 Vette rear, unusual?

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Old Nov 8, 2011 | 04:00 PM
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Default FA code L68 69 Vette rear, unusual?

I have a 69 L68 M-21 convertible with the FA code 3:70 HD Posi rear.

Is that an unusual rear for a L68?
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Old Nov 8, 2011 | 07:08 PM
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No, all 427 69 Corvette Posi rears were considered "Heavy Duty".

The big blocks used the heavy duty side axles with the threaded caps, making them "Heavy Duty" rears in Chevrolet's world.
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Old Nov 8, 2011 | 07:47 PM
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Originally Posted by gbvette62
No, all 427 69 Corvette Posi rears were considered "Heavy Duty".

The big blocks used the heavy duty side axles with the threaded caps, making them "Heavy Duty" rears in Chevrolet's world.
I was thinking more of the 3:70 ratio.
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Old Nov 8, 2011 | 08:30 PM
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3:70 was one of three optional ratios for an L68/M21, just a simple tick on the order form.
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