[goaztecs]

Now that's the kind of science I was looking for! Your sample case shows a 21% gain in absolute rotational force at the rear axle with no modification to the engine. I think that's enough evidence that my idea had merit.

He was going to change out his rear leaf-springs anyway, so might as well take that old 2.73 (yes, 2.73) non-locking rear-end out anyway, and put in a whole new axle with discs and nice, sturdy 3.73 gears....

Thanks for the analysis!