2007 Chevy 2500HD Classic Crewcab 4x4. 6.0 gas motor with cam, 8.1 liter injectors, heads off 06 corvette, cold air intake, full exhaust, and dyno tuned. Also has 4.88 gears to help with the 35" tires. It doesn't get good gas mileage, but it pulls great and the family all fits comfortably.
Video of dyno tune.