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Message: <blockquote data-quote="Jrgunn5150" data-source="post: 478929" data-attributes="member: 9682">Stock V-10 cranks are forged, and sourced from Kellogg, the same as Cobra cranks... As for durability, I dunno, but now you know what I know, lol.The 6l80e was designed to replace the 4l80/85e's, providing better mileage and to keep pace with the rapidly increasing torque input trucks are getting from the factory. Tuning is what I would worry about more than durability. The transmission are very much electronic, relying not only on vehicle speed and rpm inputs, but also on engine load, torque input, whether the brakes are applied, etc.If you are interested in going that route, I can check into standalone options for them. Like I said, it would be more for the show, than go aspect, but it's still pretty neat, I think.If you are having the motor balanced, then first find out what imbalance (if any) the 6.8 uses, and see if you can just use a 4.6/5.4 SFI replacement.</blockquote>