Is this thread strictly about rock crawlers?
It would seem to me that the above dyno example would be super for everything BUT crawlers.
What is the hot tranny setup for crawlers. Seems to be stick, since people are talking about driving at 800 RPM.
The dyno software does not chart below 2000 RPM, but I would have to say that if you have nearly 400 ft/lbs of tq at 2000 RPM, it would not be that much less at 1000 RPM. If you were using automatic trans, you would just be getting stall when the torque comes on like gangbusters. The 1100 CFM carb could be traded down for an 850 with very little HP reduction.
My dad was a lifelong certified master mechanic, working for Hudson, Nash, Rambler, AMC, then starting his own shop. I started there at 11 or 12, was THE first freshman at my high school (600 students) to EVER be promoted to AutoII, went to college for Auto Mechanics (#1 in my class), became certified as a Master Mechanic in Auto Repair + Auto Tune and Performance, then switched to motorcycles in time for the multi-valved DOHCs, becoming a certified Honda & Suzuki mechanic for 510 years & Service Manager for around the next 1520 years, with a job as Hovercraft R&D + flight instructor training squeezed in between, & a Computer Programming degree in my spare time. I was taught that putting a load on an engine with standard trans at idle & just above, would hammer (destroy) the bearings, which makes a bunch of sense, since you would only be having 10 psi or less of oil pressure (at the pump!!!)
Seems like the hot setup for crawling would be an auto trans modified to not roll backwards when the throttle was lifted.