id even say ud take em in a pull off too ive seen a 6.0 take a 05 3500 dually w/ a 6sp in the tug a truck and i know the guy w/ the 3500 cummins. all u have to worrie bout is u have to spool up cause of the 6.0 being a rev'er. but they pull them around all day unless u blow a hub or axel. its great to see these 5.9s w/ a ton of money in them get pulled back by a stock 6.0.