Torque monster sounds nice, but torque (cylinder pressure) is pretty much a function of displacement and static compression ratio. There is no magic, no inherent benefit to L6 engines. A 292" anything (Ford, Chrysler, Pontiac; L6, V6, L8, V8) with similar cam timing and CR will have similar torque characteristics.
The somewhat greater low speed torque can be obtained from any engine by the following: 240 degree cam, early intake valve closing, 116 degree LSA and 8:1 CR. But doesn't that kill peak power? Yes, it does.
