07-18-2011, 06:24 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
There were actually several flavors of the older boxes. The 3550's were usually rated for about 375 lb-ft. The TKO's and TKO II's could hold up to 475.
The newer stuff is much more torque capable, with the TKO 500 holding 500 continuous lb-ft and the TKO 600 holding 600 lb-ft. Lots more options available as well, including different overdrive ratios and such.
I would trust it for a mild application such as a 351W.
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