It's funny how people want an 8000 lb truck that was designed and geared to go 55mph in a convoy to go faster. It was designed to carry large payloads and people anywhere a tank could go.
Speed-wise, I don't think there's much difference between a 97 and an 03(except one block doesn't crack). As Phil said, all the turbo-diesels are pretty much the same. But does it really matter if your 0 to 60mph is 16 seconds or 19 seconds? Slow is slow. The duramax helps a bit, but it's still connected to a truck that was designed to go 55.
H1's are not meant to go fast. Remember the tranny/t-case/geared hubs are set up to work best at certain speeds. The GM 6.5's max sustained rpm is something like 2400rpm (on my truck - '97td - is about 65 mph). Besides, get heavy on the pedal and you'll need an air tanker to re-fuel ya on the hwy. Brakes aren't the best either. But, take one off road and you'll see why they are so fun.
Ron B
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