08-05-2013, 06:15 PM
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CC Member
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Join Date: Dec 2001
Location: Louisville,
KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,417
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Not Ranked
One is a 10 spline input, the other is a 26.
If you don't have a clutch yet, I would advise on skipping the 500 and spending the extra $90 for the 600. Then you get the option of two different overdrives, plus 100 lb-ft more torque capacity.
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