Sorry. I can't find any. The closest 9" is a 6.50:1. The only combo that creates a 6.80:1 is a 34 tooth ring gear with a 5 tooth pinion gear. I've never seen a DANA 60 ring gear with that few teeth. The 6.83:1 is a 41-6 combo. Is he positive he's got 6.80:1? Not doubting, just unfamiliar.
Take care,
-Chris
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