[400TT]

Should not be a problem in SA, these type of setups have been both state and federally approved for years.

Just make sure the wheels comply with an accepted standard - AS1638, DOT, TUV, JWL etc.

Your spinners cannot extend outside the side wall of your tyre, if they do, do what Mike did and fit hex nuts. I really like hex nuts, quite a unique look.

And just watch the available offsets, most of the 1 piece cast wheels have difficult offsets for our replicas here which either means narrowing suspension and/or body modifications. I have narrowed the suspension before on a Jag Cobra and it was an interesting experience to say the least.