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absolutely no mechanical difference between a 6.2 and the latest version of the 6.5 except, coated piston crowns and .080" of bore.........that's it. Educate me on the camshaft differences between the two. Obviously the fuel output is different on my stock 140 hp '82 vs. a 190 hp '99. The fuel output on my 250 hp pump is a bit different, and so is the air requirement to burn it. Big deal......it's all math.
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