Pretty much with axles. The common ones are either holden or ford stubs. Which then fits a holden or ford bearing.
then you would need a hub thats suits one or the other bearing. Are you following me?
the hub then has stud patterns. Also common ones are 5 studs in either ford, holden hq or ht which has different pcd. Still following me?
then you would need wheels to suit the stud pattern.
You would need to see what your current bearings are to see what type of hub you would need to suit your axle stub. Then you can go from there with what sort of wheels/stud pattern you plan to go with.
Im current going through a similar situation. Going from them 6inch wheels to 13inch wheels as the 13inch tyres are cheaper and more readily available if i was to get a blow out.