demon,
It comes back to what CraigA wrote - if you can show the car was previously registered with the mods, you should be OK. If the car is currently registered with a red, then the answer would be the same, surely
However, getting back to Liam's original question. The first two items you mention are required under the NSW regs, but not the other two. Additionally, you will need a heater/demister, electric wipers (2 speed or single speed at 45 sweep/min or faster) and seat belts front and rear.
Hope that helps,
RET