[mod7x]

the 7.3 is an iternational navistar engine, same as a dt 444 that came in city delevery trucks and school buses that international built, very bullet proof, i don,t know about the power w/out a turbo but they can't be to bad, we have a couple of non turbo 444's in 33,000 gvw boom trucks at work, they seem ok for power, but my 99 superduty w/7.3 turbo feels way more powerful but its lot lighter, only about 7000#, as for the dually part, i had a 1989 f350 dually w/460 gas engine, didn't care much for that power plant, hard on gas and it didn't seem like it had much power, but it towed great , no sway ever pulling a trailer with a race car on it that weighed about 8000# combined, remember 4 tires are better than 2 unless it's motorcyle