i've had both the 6.0L and the Duramax. undoubtedly, the duramax is better for long distance towing, but the 6.0L holds it own. granted the 6.0L works harder to achieve what the Duramax can do, but for the money, you do have to question your purchasing decision? i've towed a 2002 Cig TG, a 2000 Cig TG and a 33' Outlaw with both trucks. i wouldn't hesitate to use the 6.0L to pull the Pantera anywhere.