Source Interlink just purchased a brand-new diesel Ford F-250 crew cab dualie that we broke in on the way up to Virginia City, Nevada. With up to 40 psi of boost, this baby towed our Chevelle like it weighed 500 pounds. Our scenic route return took us through Sonora Pass in the Stanislaw National Forest (where the signs told us a crew cab dualie towing a trailer shouldn't go!) and up over Monitor Pass at 8,000 feet! The towing power was awesome!