You will need a "Blue slip" to get any out of state car registered in NSW.
I'm betting 33" tyres are more then 7% bigger then stock XJ tyres so you may need to find a spare set of stockers or a 4wd minded mechanic to get it passed.
Again the 2" suspension rule applies but a decent mechanic won't notice up to 3" .
They are usually harder on blue slip's then the normal rego check.
Who the hell knows what a stock XJ looks like anyway
https://www.rms.nsw.gov.au/documents...ifications.pdf