Fan not centered with center of radiator

I would bet the Ausie ones are shifted the other way to make room for brakes, steering etc.
Nope. They keep the same offset to the right. It is TIGHT on the right side. They had to move the steering box to a frame rail mount (no room for it on the K frame) and run a remote oil filter setup on the small blocks to make room for everything. Then try throwing clutch linkage in there, too...