About the best year you can get is a LATE 2004 LB7 Duramax until when they changed body styles in 2007.5. Those years was an upgraded LB7 from the 2001-2003 years. They bumped the RMP's a few hundred, and changed the fuel system to combat injector issues. They produce right at 300 horse and I THINK 525 foot lbs of torque, close to those numbers at least (as where the 2001-2003 are like 225 horse).
They are the easiest and cheapest to work on (but still not cheap), do good on fuel, and are VERY reliable. Also have basically no emissions stuff, no DEF, etc.
Due to all of this though, they are the highest sough after power plants to do modifications to, and if you change a few things you can get several hundred more horse out of them, OR, if you go crazy, you can put a different cam in it and change the firing order and get a 1000 horsepower Duramax. This of course makes them hold their value like crazy!
I just bought my first the other day, a Chevy K3500, Crew Cab, Dually. Duramax / Allison. It has 240,000 miles on it, and the dealer my dad works at said that if the paint was nice, they would put it on the lot at $15,500!! Sounds like a lot still to me, but, they are worth it! Pull like nothing else! ;)
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Today's Featured Article - Restoration Story: Fordson Major - by Anthony West. George bought his Fordson Major from a an implement sale about 18 years ago for £200.00 (UK). There is no known history regarding its origins or what service it had done, but the following work was undertaken alone to bring it up to show standard. From the engine number, it was found that this Major was produced late 1946. It was almost complete but had various parts that would definitely need replacing.
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