My Cruiser had a full set of lockers and sat on 37" tyres. Usually a bit of momentum or a blip of throttle would get it up most hills and through most mud holes.
I am curious to see if increased ground clearance and lower gearing will be better for the sort of thing I do. Certainly a quick blip of throttle to fire it up the last bit of the climb will no longer be an option with a 404.