I built/modified a truck with a different front axle and a big steering box outside the frame in front of the axle. It would turn to the left seemingly with the left rear wheels stationary (but not quite). It'd easily do a U-turn within 3 lanes, a truck with same wheelbase as a modern crew cab with long bed.
However to the right the tire hit steering box and turning radius was just adequate, nothing special. A compromise to get that axle and PS in there.
