On TFL truck recently on their IKE gauntlet did a max tow test 7.3 vs 6.6 GM gas. The godzilla was over a minute faster than the 6.6 with better fuel economy. It was designed to bridge the gap between the 6.2 and 6.7 diesel Ford engines for capability. Anyways I don't think people who are use to diesel towing power would think they are driving a dog or anything. My god the times I did tow with my old ED I had my foot planted to the floor muttering "let's cook this son of a b", towing a double axle uhaul with no load (a ride on lawn mower) and basically no acceleration on only a slight grade. The diesel tow power must only apply to the 3/4 ton class. I was soured at a recent dealer bill when I had lots of powertrain left, emissions stuff, anyways I have no idea how you guys tow 30 foot travel trailers. GDE must really wake the things up, mine was always stock. As far as overall acceleration my Hemi will out tow my old truck by a mile, might do so at higher revs with more noise and 10 mpg max however. Anyways godzilla is designed for fleet and commercial application that need power and reliability before fuel economy. Basically a replacement for the old 6.8 V10 that they are still making in some applications.