Nothing against an 8.3, but this kind of work (and that heavy a crankshaft/flywheel) is exactly why I wanted a full size, long haul "big rig" 855. This is the first time I actually worked it in the neighborhood of it's designed load. It seemed to love it. Puffed just a touch of black smoke when I leaned on it and never ran/idled smoother. I'm running 200 psi on the rail, 10 lbs of boost and set the governor to defuel at 2400. Not that I was anywhere near those numbers pulling this up the ramp. I haven't hit the road yet. Just spent 5 or 6 hours pulling it up in 1-2 ft increments as we laid down ramps to raise the trailer enough to minimize high centering at the crown of the ramp. Still dug a couple channels in the black top with my cargo chains (that wrap the frame rails) but mostly cleared it. It would drag it through the concrete and black top but I was afraid I'd crack a weld on the trailer or something stupid so I tried to be as easy as I could. But I was on this ramp for 8 days and ready to gtfoffit. It was like a mini drydock really, trying to raise a damaged hull without collapsing it.