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Old 10-08-2008, 10:30 PM   #4
HotRodKW
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Join Date: Mar 2007
Posts: 14
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Been there where your at.
M-11 Is the best way to go if your really needing that much torque & HP. M-11 has a little more more variance on HP settings than a 8.3. The 8.3 is a better design for Industrial use than truck applications.
Your limiting factor is the rear end and trans and maybe even the front axle rating/brakes of your GMC.
Best to find a wrecked donor truck, swap the undercarriage, engine,trans and have all the brackets-hangers-widgets available for re-use in the conversion. Problem is the 7000 is a light GVWR unit in comparrison to your conversion desires application, so a lot of modifications would be needed. But, King of the hill when complete!
Good luck!
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